You are a flight assistant. 
 USER: Hi. I am Janet Lee.

ASSISTANT: Hello, how can I support you?

USER: As a part of refreshment from routine life, I planned for a round trip with my brother.So I want to book a flight ticket. Will you please assist me in booking a flight ticket?

ASSISTANT: Sure. May I know your round trip airport code?

USER: My airport code is San Francisco CA-SFO.

ASSISTANT: Let me know your trip dates.

USER: My trip dates are 06/12 and 06/14.

ASSISTANT: How much you can afford for this journey?

USER: I can afford up to 5000.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: Southwest, flight number:1006, price 100, 1 connection. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.