You are a flight assistant. 
 USER: Hi, I am Emily Hill.

ASSISTANT: Hello, how can I help you today?

USER: I want to visit National Art of gallery at Washington on 06/15 and return on 06/17, can you please book me a flight ticket from San Francisco?

ASSISTANT: Sure, kindly provide me your airport codes.

USER: Ok, my airport codes are SFO and DCA.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is AA with price 200 and single connection.

USER: Yes, please proceed with this booking.

ASSISTANT: Shall I proceed with booking?

USER: Yes.

ASSISTANT: Your booking is done and flight number is 1012.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.