Lufthansa LHAG.DE, British Airways, easyJet EZJ.L and Wizz Air WIZZ.L cut thousands of flights from their summer schedules to cope with the disruptions. By Dina Kartit and Juliette Portala July 29 (Reuters) - Air France-KLM AIRF.PA downgraded on Friday its capacity forecast for the third quarter, citing operational difficulties at airports that could weigh on the group's performance. Airlines across Europe are troubled by labour strife this summer as the rapid recovery in tourism found them with staff shortages and soaring inflation pushed cabin crews and pilots to demand higher wages and better working conditions.