-환승 카운터는 어디입니까?

- Where is the transfer counter? --> Where is the transit counter?

-환승하려면 어디로 가야 하나요?

-Where am I going to transfer?  --> Where do I make my connection?

-짐을 찾아야 하나요?

-Do I get the baggage?   --> Do I need to pick up my luggage?

​=> This sentences are okay. These are other ways of saying them.