If you have not paid for your booking yet, and it is only at the contact phase with your pet sitter, you can change the date(s) of the request by opening the message and clicking on Change booking details, on the Booking details tab.
If you wish to change any other details of the booking, such as the service type, or to add or remove a pet, please send a new request to the pet sitter, and a new quote will be generated.
If you wish to add or remove dates from the booking, please also send a new request to the pet sitter, so that the new amount will be calculated and a fresh quote generated.
If you have already paid for your booking, please see our Help Centre article: How do I change dates or details of a booking?