diff --git a/components/booking/AvailableTimes.tsx b/components/booking/AvailableTimes.tsx
index 2e1f5f3e..6f4e4130 100644
--- a/components/booking/AvailableTimes.tsx
+++ b/components/booking/AvailableTimes.tsx
@@ -1,7 +1,7 @@
 import dayjs from "dayjs";
 import isBetween from "dayjs/plugin/isBetween";
 dayjs.extend(isBetween);
-import { useEffect, useState } from "react";
+import { useEffect, useState, useMemo } from "react";
 import getSlots from "../../lib/slots";
 import Link from "next/link";
 import { timeZone } from "../../lib/clock";
@@ -14,14 +14,18 @@ const AvailableTimes = (props) => {
   const [loaded, setLoaded] = useState(false);
   const [error, setError] = useState(false);
 
-  const times = getSlots({
-    calendarTimeZone: props.user.timeZone,
-    selectedTimeZone: timeZone(),
-    eventLength: props.eventType.length,
-    selectedDate: props.date,
-    dayStartTime: props.user.startTime,
-    dayEndTime: props.user.endTime,
-  });
+  const times = useMemo(() => {
+    const slots = getSlots({
+      calendarTimeZone: props.user.timeZone,
+      selectedTimeZone: timeZone(),
+      eventLength: props.eventType.length,
+      selectedDate: props.date,
+      dayStartTime: props.user.startTime,
+      dayEndTime: props.user.endTime,
+    });
+
+    return slots;
+  }, [props.date]);
 
   const handleAvailableSlots = (busyTimes: []) => {
     // Check for conflicts
@@ -80,6 +84,7 @@ const AvailableTimes = (props) => {
       </div>
       {!error &&
         loaded &&
+        times.length > 0 &&
         times.map((time) => (
           <div key={dayjs(time).utc().format()}>
             <Link
@@ -95,6 +100,11 @@ const AvailableTimes = (props) => {
             </Link>
           </div>
         ))}
+      {!error && loaded && times.length == 0 && (
+        <div className="w-full h-full flex flex-col justify-center content-center items-center -mt-4">
+          <h1 className="text-xl font">{props.user.name} is all booked today.</h1>
+        </div>
+      )}
       {!error && !loaded && <div className="loader" />}
       {error && (
         <div className="bg-yellow-50 border-l-4 border-yellow-400 p-4">
diff --git a/pages/api/book/[user].ts b/pages/api/book/[user].ts
index db82b3e6..1140a653 100644
--- a/pages/api/book/[user].ts
+++ b/pages/api/book/[user].ts
@@ -1,21 +1,53 @@
 import type { NextApiRequest, NextApiResponse } from "next";
 import prisma from "../../../lib/prisma";
-import { CalendarEvent, createEvent, updateEvent } from "../../../lib/calendarClient";
+import { CalendarEvent, createEvent, updateEvent, getBusyCalendarTimes } from "../../../lib/calendarClient";
 import async from "async";
 import { v5 as uuidv5 } from "uuid";
 import short from "short-uuid";
-import { createMeeting, updateMeeting } from "../../../lib/videoClient";
+import { createMeeting, updateMeeting, getBusyVideoTimes } from "../../../lib/videoClient";
 import EventAttendeeMail from "../../../lib/emails/EventAttendeeMail";
 import { getEventName } from "../../../lib/event";
 import { LocationType } from "../../../lib/location";
 import merge from "lodash.merge";
 const translator = short();
+import dayjs from "dayjs";
 
-interface p {
+const isAvailable = (busyTimes, time, length) => {
+  // Check for conflicts
+  let t = true;
+  busyTimes.forEach((busyTime) => {
+    const startTime = dayjs(busyTime.start);
+    const endTime = dayjs(busyTime.end);
+
+    // Check if start times are the same
+    if (dayjs(time).format("HH:mm") == startTime.format("HH:mm")) {
+      t = false;
+    }
+
+    // Check if time is between start and end times
+    if (dayjs(time).isBetween(startTime, endTime)) {
+      t = false;
+    }
+
+    // Check if slot end time is between start and end time
+    if (dayjs(time).add(length, "minutes").isBetween(startTime, endTime)) {
+      t = false;
+    }
+
+    // Check if startTime is between slot
+    if (startTime.isBetween(dayjs(time), dayjs(time).add(length, "minutes"))) {
+      t = false;
+    }
+  });
+
+  return t;
+};
+
+interface GetLocationRequestFromIntegrationRequest {
   location: string;
 }
 
-const getLocationRequestFromIntegration = ({ location }: p) => {
+const getLocationRequestFromIntegration = ({ location }: GetLocationRequestFromIntegrationRequest) => {
   if (location === LocationType.GoogleMeet.valueOf()) {
     const requestId = uuidv5(location, uuidv5.URL);
 
@@ -47,10 +79,43 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     },
   });
 
+  const selectedCalendars = await prisma.selectedCalendar.findMany({
+    where: {
+      userId: currentUser.id,
+    },
+  });
   // Split credentials up into calendar credentials and video credentials
   const calendarCredentials = currentUser.credentials.filter((cred) => cred.type.endsWith("_calendar"));
   const videoCredentials = currentUser.credentials.filter((cred) => cred.type.endsWith("_video"));
 
+  const hasCalendarIntegrations =
+    currentUser.credentials.filter((cred) => cred.type.endsWith("_calendar")).length > 0;
+  const hasVideoIntegrations =
+    currentUser.credentials.filter((cred) => cred.type.endsWith("_video")).length > 0;
+
+  const calendarAvailability = await getBusyCalendarTimes(
+    currentUser.credentials,
+    dayjs(req.body.start).startOf("day").utc().format(),
+    dayjs(req.body.end).endOf("day").utc().format(),
+    selectedCalendars
+  );
+  const videoAvailability = await getBusyVideoTimes(
+    currentUser.credentials,
+    dayjs(req.body.start).startOf("day").utc().format(),
+    dayjs(req.body.end).endOf("day").utc().format()
+  );
+  let commonAvailability = [];
+
+  if (hasCalendarIntegrations && hasVideoIntegrations) {
+    commonAvailability = calendarAvailability.filter((availability) =>
+      videoAvailability.includes(availability)
+    );
+  } else if (hasVideoIntegrations) {
+    commonAvailability = videoAvailability;
+  } else if (hasCalendarIntegrations) {
+    commonAvailability = calendarAvailability;
+  }
+
   const rescheduleUid = req.body.rescheduleUid;
 
   const selectedEventType = await prisma.eventType.findFirst({
@@ -61,6 +126,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     select: {
       eventName: true,
       title: true,
+      length: true,
     },
   });
 
@@ -103,6 +169,12 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     },
   });
 
+  const isAvailableToBeBooked = isAvailable(commonAvailability, req.body.start, selectedEventType.length);
+
+  if (!isAvailableToBeBooked) {
+    return res.status(400).json({ message: `${currentUser.name} is unavailable at this time.` });
+  }
+
   let results = [];
   let referencesToCreate = [];