Passengers on cancelled Lufthansa flights will not be able to get to the airport during the strike by ground staff planned for Wednesday, the German airline said. “Due to the strike, the rebooking counters are unfortunately not staffed,” the airline wrote on its website. Free rebooking options are available via lufthansa.com, the customer app and the service centre, it said. Tickets for domestic German flights could be converted into vouchers for rail travel, the airline said. Trade union Verdi called on Lufthansa’s ground staff to strike on Wednesday. Airports in Frankfurt, Munich, Hamburg, B…