Yes, you'll find most hotel bookings are fully refundable provided that you cancel before the hotel's cancellation deadline, which often is within 24-48 hours of the scheduled arrival. If you have a reservation that's non-refundable, you might be able to cancel it and be given a refund within 24 hours of booking. Add your dates and click on "Search", then you can use the "fully refundable" filter to review the best options available near South Beach Corniche.