Confirm appointment with phone number only

Cal has been updated to version 5.5 and has a feature that would be very useful to have in FluentBooking.

You can now schedule an appointment using just a phone number.

This is very important because, in my case, as I work with elderly people who use WhatsApp more, simply asking for their phone number to confirm the appointment makes things much easier.

Here's a suggestion for implementing this feature in FluentBooking as well.