You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Lee.

ASSISTANT: How may I support you today?

USER: I am planning to travel from IAD to SFO. Can you please help me to book a ticket?

ASSISTANT: Let me know your travelling dates please.

USER: My travelling dates will be on 01/13 to 01/15.

ASSISTANT: May I know your budget for flight ticket?

USER: Fare is 200.

ASSISTANT: We found a flight with couple of connections, shall I proceed with the booking?

USER: No, do not proceed. Thank you.

ASSISTANT: Ok, thank you.