What information can be modified in a reservation?
There are three main modifications that can be made to a reservation: adding rooms, cancelling rooms and amending the length of stay (by changing the check-in or check-out date).
Within that, there are a few more guest-related aspects that can be modified, including smoking preference, number of guests, the main guest’s name and credit card details.
You can find more information here:
For OTA users:
For B_XML users: