https://forums.operationsports.com/forums/forum/football/madden-nfl-football/madden-nfl-football-online/tfl/26823107-is-there-a-24-7-customer-service-line-for-united-airlines
Yes, Lufthansa allows you to book multi-city flights. When you search for Lufthansa flights via alternative airlines, you can use the multi-city search tool of the airline to plan your multi city trip and choose Lufthansa as your preferred airline. Remember that the multi-city airlines of Lufthansa are generally between European cities or countries.