Click the Booking Engine tab.

Click Room Reservation Report on the left navigation.

Enter the reservation reference number.

Click Search.

Click the [details] link to the right of the reservation.

Select the Room(s) you wish to cancel.

Click the cancel rooms for this booking link.

Enter any comments if you wish and choose whether to send the cancellation email to the guest or not then click cancel selected rooms.

The system will then tell you the reservation is canceled in the Process cancellations window.