Air Busan's official FAQ says tickets bought from travel agents and other sellers can be looked up while logged out, using My Page → My Reservations → Search by Booking Number. Locate the airline booking reference on the seller's confirmation. Air Busan's reference is six characters beginning with K; enter it with the passenger's name, writing English names family name first, then given name. This is not necessarily the agency's order number. For a ticket purchased through a third party, the airline instructs customers to contact the original seller for changes or refunds. Being able to retrieve a booking does not mean Air Busan can directly refund the agent's ticket. Recheck itinerary and travel documents before departure.