The reservation for a flight on Bulgaria Air could easily be contacted from the airlines’ website or by a third-party travel agent. To reschedule, the client should use the booking reference number and the surname to sign in. Alterations on the reservation, supplementary services added, or payment for additional charges like luggage could be made. Alternatively, the client could opt for a refund and cancel his or her booking if need be . Travel documents like e-tickets and boarding permit and citizen authorization can be linked via the airlines’ website or client’s app.