Germany’s largest air carrier Lufthansa has cancelled 1,200 flights planned for Friday (September 7), when its flights attendants are staging a walkout, The Local news portal reported on Thursday.

The strike will be held in the country’s major airports in Frankfurt, Berlin, Hamburg, Munich, Dusseldorf and Stuttgart.

“We still hope that it's possible to avoid a strike and return to the negotiating table. We are canceling two-thirds of flights. It is important that we provide notification in advance,” Lufthansa spokesman Michael Lamberty said.

Last Tuesday Lufthansa cancelled 300 flights due to striking flight attendants. The strike lasted 8 hours and paralyzed the work of three airports.

The flight attendants are demanding a 5-percent increase in wages. Negotiations between Germany’s flight attendant union UFO and the employer have so far been deadlocked.

Lufthansa said that they could increase wages by no more than 3.5 percent due to increased competition in the aviation market and fuel prices.