Agnes: I want to fly to Geneva.
Jake: Yes.
Agnes: When is the next flight?
Jake: The next flight is at 16:15. And it arrives at 18:40.
Agnes: Book me on that, please.
Jake: Single, or return?
Agnes: Single.
Jake: Economy?
Agnes: No, first class.
Jake: Just a minute. I'll check if that's OK. That's all right. That's $ 275, please.
Agnes: I'll pay it with my credit card.
Jake: Thank you.
Agnes: What time is check-in?
Jake: You can do it online or if you do it in person, no later than 15:30. I will send you an email with all the details.
Agnes: OK, thank you.
It's not a messenger-like dialogue.  