Airline ticket reissue is modifying the flight day of the booked ticket. a whole new ticket is issued for this kind of changes, Subsequently, a different PNR is issued for the new ticket. In a nutshell, you can https://wisconsin.forums.rivals.com/threads/%F0%9F%93%9E-6531580287-how-to-change-cancel-qatar-airways-flight-booking-in-singapore.35474/