To access the Pending Bookings log onto the admin area as normal and navigate to the Pending Bookings tab on the left hand side
The system will then show you the bookings on your system that are due to pay deposits.
If you view the details by clicking the View/Edit Details you will then be taken to the following screen
You can then update any of the booking details obviously if you don't update, it won't be saved.
There is full instructions on this page, remember these points though,
If you click cancel in the actions column that individual booking and the details associated with it are lost. If you click Finalize the system accepts you have received the deposit
If you click on the booking name it will open and address a new email to the persons address they have logged as a contact email address when completing their booking.