Yes, you'll find most room reservations are refundable if you cancel before the accommodation's cancellation deadline, which often is within 24-48 hours of your check-in date. If your reservation is non-refundable, you might be able to cancel it and receive a refund within 24 hours of booking. Add your dates and click on "Search", then use the "fully refundable" filter to get the best deals near San Martin Square.