Bookings can be viewed, made and cancelled simply by sending standard SMS text messages from a normal mobile phone.
Once your mobile phone has been registered to your user name then sending simple SMS text messages in a predefined format allows you to view, add and delete bookings as well as finding an available time slot.
As a simple example - suppose you are in the car (or somewhere else without normal internet access) and you fancy a quick flight, simply send the following text-:
avshared find 3
The system will find the first available free period of at least 3 hours, reserve the period for you and text the booked period back to you.
Many more commands are available, the online help system contains full details.