5.) Situation: Napa is on a train i

5.) Situation: Napa is on a train in England.
Man: _A_
Napa: _B_... Oh no, I'm sorry.

A. 1. Whose seat are you in now?
2. Move to another seat. This is my seat.
3. How come you're sitting in the wrong seat!
4. Pardon me, I think you've taken my seat.

B. 1. Are you sure you're right?
2. I don't think so, but let me check my ticket.
3. No, it's my seat. You should find another one.
4. I'm sure you're wrong. Please take the other one.