With this application, it is possible to receive the new Fare calculation based on revised itinerary in the PNR for tickets “before departure” when the trip has not started yet, as well as for tickets “after departure”, ie. for partly used tickets. After the Fare calculation is agreed, the Filed Fare and the Exchange mask prepared for exchange/reissue process is stored in the PNR. The ticket can be exchanged/reissued immediately or later based on stored ticketing data.