Australian Airlines, a subsidiary of Lufthansa, has canceled more than 140 flights that were scheduled on March 5th and 6th, as the airline collectively bargains with Vida, the union representing cockpit and crew members. Vida vehemently opposes the company’s offer of a 2.1% inflation compensation and a one-time bonus of 1.4%, calling it “unacceptable”. The union also said that they haven’t ruled out going on strike if management refuses to level with them. The two sides will meet next on Tuesday and again on Wednesday to resume bargaining.
See "Austrian Airlines cancels 140 flights during union negotiations", Kurt Hofmann, Air Transport World, March 5, 2018