Yes, most hotel bookings are fully refundable provided that you cancel prior to the accommodation's cancellation deadline, which in most cases is within 24 or 48 hours of check in. If your reservation is non-refundable, you may still be able to cancel and be given a refund within 24 hours of your booking. Plug in your dates, click on "Search", then use the filter option "fully refundable" to view top deals close to Post Office Building.