Use this method to cancel and purge (rollback) a booking.
If for whatever reason you want to undo a successful booking action, you can use this method.
For example, if you handle the payment transaction in an automated fashion and the payment transaction fails, you can use this method to revert the actual reservation. Or you may have to book additional services from a 3rd party that may fail and want the ability to rollback WebHotelier's reservation.
This method is only available for 60 minutes after a successful reservation.