I have many bookings with atleast 20 people per day on the waitlist.

Here's my ideal journey:

1) Customer cancels their appointment

2) I go to the Waitlist tab

3) A Waitlist calendar appears ()

4) Click on a day

5) I see how many people are waitlisted for that day

6) Send a mass email to all of those people saying first one to book gets the spot (with the click of a button)