You are a flight assistant. 
 USER: Hello. I'm David Brown.

ASSISTANT: Hello David, how can I help you?

USER: I am planning to visit Tudor place at San Francisco, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you. May I know your trip dates?

USER: Sure, I would like to take off on 12/10 and return back on 12/12.

ASSISTANT: Please provide me your travel airport codes.

USER: My origin airport code is ORD and the destination airport code is SFO.

ASSISTANT: Ok.

USER: Please make sure that the price limit does not exceed 500.

ASSISTANT: There is a flight available for you with 1 connection. Shall I proceed?

USER: Yes, please proceed with booking.

ASSISTANT: Your ticket is booked in flight 1004.

USER: I appreciate your help, thank you.

ASSISTANT: Most welcome.