Budget airline Easyjet warned its passengers in France to expect cancellations and delays on Wednesday as flight attendants launched an open-ended strike. \"Six flights have been cancelled and flights are being planned with an average of two hours delay,\" an Easyjet spokeswoman told AFP, noting that Paris\'s two main airports -- Charles de Gaulle and Orly -- as well as the airport in Lyon had been affected. Easyjet warned that \"some flights can even be cancelled at the last moment\". The UNAC union, which represents about 40 percent of the company\'s flight attendants, launched the strike in a bid to obtain better contract conditions including career plans, incentive bonuses and improved compensation during medical leaves. The strike was open-ended and it was unclear how long the disruptions would last. Easyjet employs about 500 flight attendants in France.