Fill in each blank with the choice that best suits the situation until the dialogue is complete.

Dialogue One 

Passenger A: Excuse me, is this seat taken?
Passenger B: No, I don't think so.
Passenger A: Thanks. Where will you go?
Passenger B: What a coincidence!
Passenger A: Really? What is your seat number?
Passenger B:  And you?
Passenger A: I am on the third row, No. 10.
Passenger B: Could you please keep an eye on my luggage? Passenger A: No problem.
Passenger B: Thank you so much.