Possibly an option where, as a hairdresser/nail technician, when you move or cancel an appointment (which we reschedule or cancel ourselves), you can indicate an option to send an email to the customer to inform the customer about this. In case of cancellation, late payment of the deposit, wrong appointment,... whatever reason if we reschedule or cancel an appointment.

If you, as the owner, now delete or move an appointment, the customer will not be notified. Would opt that an email is not sent by default, but that you get the option to notify the customer or not. Seems useful to me :-)