A: Excuse me, is it okay if I sit here?
B: Sure.
A: Would you mind if I asked you something?
B: I don't mind, go ahead.
A: How long we have to wait?
B: About 15 minutes.
A: That long?
B: Yeah. Anything else?
A: Can I borrow your pen? I need to write something up.
B: Sure, here it is.
A: Thank you.
B: You're welcome.
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