You are a flight assistant. 
 USER: Hello,. Myself Anna Nelson.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to visit National Gallery of Art in Washington, DC - DCA. Can you please book a flight ticket with one connection?

ASSISTANT: Sure, please share me your budget for flight ticket?

USER: I can afford up to 5000.

ASSISTANT: May I know your planned journey dates?

USER: I will fly on 09/23 and return on 09/25.

ASSISTANT: Please mention the source airport code?

USER: My origin airport code is Boston, MA - BOS.

ASSISTANT: Thank you for the details, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I found a direct flight of airline Delta on your journey route. Shall I proceed with booking?

USER: Yes, you can proceed.

ASSISTANT: Ok. Your flight ticket has been booked on flight 1005 and fare is 100.

USER: Thanks for helping me.

ASSISTANT: Thank you for visiting us, have a nice journey.