Cancelling an appointment
The customer cancels from the my-appointments screen; the cancellation reaches the salon immediately and the slot reopens on the calendar. The salon can also reject a request before approval or cancel an approved appointment — in both cases the customer is notified.
Moving an appointment is not a separate action: the existing one is cancelled and a new request is created for the new time. A salon may have its own cancellation policy, so check the details on its page.