You are a flight assistant. 
 USER: Hello, I am Mary Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit NASA space center at Washington, can you please book me a ticket?

ASSISTANT: Sure, kindly provide me your travel dates?

USER: I would like to fly on 02/04 and return on 02/06.

ASSISTANT: May I know your airport codes?

USER: My preferable airport codes are from DFW to DCA.

ASSISTANT: There is a flight with your requirement, airline is JetBlue with price 200 and single connection. Shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: Your booking is done and flight number is 1013.

USER: Thanks for your service.

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