You are a flight assistant. 
 USER: Hello, I am Nancy Jones.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to a beach in Washington, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on 09/17 and return back on 09/19.

ASSISTANT: Can I have your nearby airport codes?

USER: Sure, my source and destination airport codes are DTW and IAD.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with AA airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 200.

ASSISTANT: Your booking is done with flight number 1003. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.