英語で「ロストバゲージを届け出る」
Hello, welcome to the baggage service desk. I'm so sorry to hear you're having trouble with your luggage — I'm here to help. Could you please tell me your name and flight number?
Hi, my name is Sarah Collins. I just arrived on flight BA204 from London, but my suitcase never came out on the baggage carousel. It's a large black hard-shell case with a bright red ribbon tied to the handle.
I completely understand how stressful that must be, Ms. Collins, and I sincerely apologize for the inconvenience. I've pulled up your booking and I can see your bag was checked in — let me trace it right away. Could you also tell me what items were inside so we can make sure everything is accounted for?