FRANKFURT (Reuters) – Germany’s flag carrier Lufthansa reported a bigger-than-expected quarterly loss on Thursday as rising fuel costs cancelled out revenue gains from booming travel demand after lifted COVID-19 restrictions. The airline’s adjusted loss before interest and taxes (EBIT) narrowed to 591 million euros ($627.46 million) in the first quarter from the 1.05-billion-euro loss it reported for the same period of 2021. Analysts had on average expected the loss to narrow to 558 million euros according to a company-provided consensus. At the same time, sales more than doubled to 5.36 billi…