You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Linda Johnson. I want to book a ticket from DCA to SFO to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am departing on Feb 13 and return on Feb 15.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need a flight with connection limit 1.

ASSISTANT: Can you please share your depart time and return time?

USER: I want to return in evening time.

ASSISTANT: Do you have any other requirements?

USER: I do not have any other specifications.

ASSISTANT: We found an AA airline, flight number: 1022, return time: 20:00PM, price: 200 with one connection.

USER: Please proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.