Control when the reservation is over - email notification

[YaKs]

Good morning,

I am intensively using phpScheduleIt like Reservation System in my work. We book drivers, laptops, pen drives and of course meeting rooms,... it is very flexible and robust.
My problem appears when a user book for example a laptop for one week and after that week the system doesnt control the laptop was actually gave back.
Thinking about it I will add one more flag apart of
Auto-assign permission     
Approval Required    
Allow Multiple Day Reservations

called like 'Check devolution'. So when the time expires an email is sent to the user and the admin email for that schedule.

In an improved solution, the resource will change the state from booked to 'pendent for devolution'. During that time the resource will be block for new reservations (and in other color) and show up which person has it now.
In this way you always know who has what all the time.

Thanks a lot.
Jose