You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Paul Lee from Washington. I have to go to Boston in this week. Can you please book a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Thank you for accepting my request, I want to take off on 11/28 and please book my return ticket also on 11/30.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: I would like to take off from IAD airport because this airport is near to my location and destination airport is BOS.

ASSISTANT: There is a flight with ticket fare 100 in Spirit airlines with a stopover. Is it ok for you?

USER: Please book this flight ticket for me.

ASSISTANT: Your booking is confirmed with flight number 1002.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us, have a nice day.