You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Could you please book a flight ticket from DCA to SFO?

ASSISTANT: Sure, please provide your trip dates.

USER: My trip dates are Sept 12 and Sept 14.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Helen Evans.

ASSISTANT: There is a flight in economy class with frontier Airlines and ticket fare of 100. Can I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket is confirmed in flight 1022.

USER: Thank you.

ASSISTANT: Thank you for opting us.