Reservations within e-Res can be assigned a reservation "status" to allow you to organise the reservations however you require.

When installed, a number of default statuses are configured automatically.  To specify add or edit the status list, open up the Settings screen from the Administration tab at the top of the screen.

Then, on the Settings screen, select the Reservation Statuses option, then click on the Edit Status List button.

This will open up the Status List screen as shown below.  

Use the New, Edit and Delete buttons on the right of the screen to change the available statuses which are available to assign to your reservations.