31.   Fare wars then flare up as the airlines try to fill empty seats.

32.   Fares, expected to dip in the short term as airlines try to persuade passengers to fly again, will probably rise in the future.

33.   For their part, British Airways executives acknowledge that the mishaps were a black eye on the reputation that the airline tries to cultivate for exemplary service.

34.   For now, airlines are trying to do this by training thousands of additional workers to recognize legitimate ticket confirmations or ways to search suitcases.

35.   He also said the airline is trying to do a better job of anticipating overbooked flights before boarding and offering incentives to generate volunteers.

36.   In addition, airlines have been trying to raise fares, and they have been relatively successful because of the infrequency and shallowness of fare wars.

37.   In planning cancellations for the next three months, the airline is trying to avoid being caught short-handed.

38.   In the meantime, airlines are trying to assure customers that airports are not as chaotic and inconvenient as many suppose.

39.   In the past, airlines tried to mollify delayed passengers by feeding them or putting them up in hotels when they got stuck at Hartsfield.

40.   Jim Faulkner, a Northwest spokesman, said the airline was trying to reschedule passengers on other carriers.