According to Air France's statement, they expect to operate 50% of their long-haul flights, 75% of their medium-haul flights and 85% of their short-haul flights. As the crew on some of their flights will be reduced, they will not be able to accommodate all passengers who have booked a flight with them.
In case you are affected by the disrupted flight schedule, Air France is offering rebooking options at no extra cost. You may be able to postpone your trip, change your departure origin or even cancel your ticket. In such cases, they are promising a non-refundable voucher valid for one year.