post https://api.appointedd.com/v1/bookings//customers//cancel
Cancels a customer's booking in your organisation using the booking's unique identifier and the unique identifier of the customer's record on that booking.
This will cancel a booking for a single customer on a booking, but not cancel the underlying booking. This is useful for group bookings which can have more than one customer on them. If you want to cancel the underlying booking along with all of the customers on it you can use the Cancel Booking endpoint.