You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you?

USER: I want to visit Golden Gate Bridge in San Francisco, CA - SFO. So please book a flight ticket from DCA.

ASSISTANT: Sure, could you please provide your journey dates?

USER: My journey dates are from 04/19 to 04/21.

ASSISTANT: May I know your name?

USER: Sure, my name is Karen Young.

ASSISTANT: We found a flight with Southwest airlines of 1003 flight and price limit is 100 with single connection. Shall I proceed for booking?

USER: Proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.