translate English to French: Secondly, my ticket was issued by Sabena, a company which is a member of IATA, while I was travelling, without my knowledge, with a company which was not a member of IATA.
Secundo, mon billet marquait bien Sabena, autrement dit une compagnie affiliée à l'IATA alors que, sans le savoir, je voyageais avec une compagnie qui n'en est pas membre.