Modification of Reservation: Price quoted applies to exact date(s)/nights/stay booked. Modifications to your reservation (including but not limited to name changes, date changes, etc.) are not permitted. However, for bookings in the United States, Mexico and the Caribbean, a request to cancel an existing Advance Purchase/Non-Refundable reservation and book a new reservation may be permitted if at the time you are requesting a change to your reservation, you book a new Advance Purchase/Non Refundable reservation at any hotel in the Hilton Worldwide portfolio located in the United States, Mexico or the Caribbean, subject to availability. Upon receipt of full payment for the new reservation, Hilton will issue a refund for the cancelled reservation, less a service fee. It may take up to four (4) weeks for the refund to be reflected on your credit card. For stays originally booked at the Waldorf Astoria, Conrad, Hilton, Embassy Suites or Doubletree brand hotels, the service fee is $50.00 and for stays originally booked at a Hilton Garden Inn, Hampton, Homewood Suites and Home2 Suites, the service fee is $25.00. For a cancellation and rebooking to be considered, you must call our Advance Purchase Department to request a change to your reservation at (800) 236-7113 or (972) 726-3361 no less than three days prior to your scheduled check-in date.