Hello,
I'm new at database design and I'm trying to make my first real program.
Administration /reservation of numberplates to be used in car garage
now the following fields are in the database
-user who made the input
-date/time out
-date/time back
-customer name
-destination
-memo
-back (yes/no)
-out (yes/no)

now i can see which numberplates are out and which are still available

So , i want to add a new module(the reservation of plates)
When i customer comes in and asks for  using any numberplate,
i want to give in the date/time out date/time back and i when i push the
button
i want a grid filt with available license plates in that period
Now i'm not sure how to do the reservation part in table design.
Any suggestions