You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am David Allen. I am planning for a round trip from BOS to BOS, can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you share your journey dates?

USER: Sure, I would like to take off on 06/13 and return on 06/15.

ASSISTANT: How can much you can afford for your ticket?

USER: My price limit is 1000.

ASSISTANT: There is a connecting flight with number 1012 in airline Southwest, the fare is 100. Can I book it?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.