If you have a booking that the pet owner wants to cancel, you can follow these step:
If the booking has not been paid for, there is nothing more to do.
If the booking has already been paid then payment becomes unassigned. Unassinged payments will sit against the Pet Owner as a credit and can be reassigned to a new booking (manually). To refund money to the Pet Owner, you will need to delete the payment and manually pay owner.