(AGI) Paris, Sept 13 - Air France is to cut 50 percent of itsflights as of next Monday, when the week-long pilots' strikeagainst cost cuts kicks in. The strike, due to end on Sept. 22,will cost the company between 10 and 15 million euros a day,CEO Francois Gaey told the broadcaster France Inter. Air Franceis planning to invest in the Transavia airline in order toboost market share, and to transfer its own pilots on contractsdeemed unacceptable by the unions. . .