You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: I want to travel to SFO, can you please help me to book a flight from IAD?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Dec 17th and 19th.

ASSISTANT: Do you have any connection limit?

USER: I am fine with a connecting flight.

ASSISTANT: Any other specifications to be met?

USER: No, I don't have any.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline UA with flight 1027 having a fare 200 with stopover. Shall I proceed with booking?

USER: Please procced.

ASSISTANT: May I know your name?

USER: My name is Joseph Clark.

ASSISTANT: Your booking has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you.