Yes, most hotel room reservations are fully refundable if you cancel prior to the accommodation's cancellation deadline, which often is within 24-48 hours of your check-in date. If you booked a non-refundable reservation, you might still have the option to cancel and receive a refund within a 24-hour period of your booking. Plug in your dates, click on "Search", then you can use the "fully refundable" filter to review the best options available near Basilica di San Giovanni in Laterano.