The entire search and booking process is completed by your application via the XML API. You remain in control of the customer and the user interface for the entire booking process.
Steps
Perform a HotelAvailabilitySearch
Perform a MakeReservation
Steps Making a reservation with Prebooking
Perform aHotelAvailabilitySearch
Perform a MakeReservation without sending payment information. This will create an unconfirmed booking. From there only the price is confirmed but not the availability . You have limited time in completing the next step in order to Confirm the booking
Perform PayReservation
Work Flow for Making a reservation with PreBooking