https://www.iso20022.org/sites/default/files/webform/create_change_request/_sid_/American-book-a-flightt.pdf
https://www.iso20022.org/sites/default/files/webform/create_change_request/_sid_/American-book-a-flightt.pdfhttps://www.iso20022.org/sites/default/files/webform/create_change_request/_sid_/American-book-a-flightt.pdf