The CancelReservations method provides the ability to send reservation cancellation requests.

The Cancel Reservations Notification method provides the ability to send cancellation notification requests.

The CreateReservations method provides the ability to send reservation requests to SynXis CR.

The Create Reservations Notification method is virtually identical to the Create Reservations method is used to include a confirmation number to identify the reservation, as well as the full details of the reservation.  

The CRS Reservation Delivery (HTNG) (OTA_HotelResNotifRQ) is used to communicate reservation data from SynXis to a hotel.