介绍:
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A：Excuse me, can you show me where seat 24D is?
B：Down this aisle, to your right.
A：Thank you.
（After few minutes…）
A：Excuse me, but I think you’re sitting in my seat. What’s your seat number?
C：It’s 24E. Oh，I’m sorry, I made a mistake.
A：Don’t worry about it.
C：But may I change seats with you?
A：Ok.
C：Thank you.
A：You’re welcome.
（After one minutes…）
A：Excuse me, Can you help me put my baggage in the overhead compartment, please?
C：Sure. You also can put the baggage under the seat in front of you.
A：Ok, thanks.
