With the Caspian Airlines manage booking system, existing customers are eligible to change their reservations by cancelling their reservations, modifying their flight schedule or purchasing a new flight. Further, customers may even get a seat upgrade, add luggage and change their booking settings. The customers may also check the following flights and other frequent flyer information. Eventually, they may need to sign into their account on the Caspian Airlines website or call a reservation customer service representative to create changes to a booking.