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https://www.pcmasters.de/forum/threads/%E2%84%A2understanding%E2%84%A2travel%E2%84%A2-does-lufthansa-allow-date-changes.153937/

https://www.pcmasters.de/forum/threads/ask-dispute-does-lufthansa-have-a-free-cancellation-policy-always-compensation.153927/