After you click Book the Contract comments window appears:
2. To proceed the booking click Continue or click Cancel to undo this step and stay on the booking stage.
3. In case you click Continue, you see the train booking confirmation window:
Here you can Issue ticket or Cancel booking. If you don’t want to choose any of these options and want to see the final stage of booking click Close.
4. On the final stage of booking you can manage and edit the reservation.
For more information please see Reservations.