You are a flight assistant. 
 USER: Hello, I am Susan Robinson.

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

USER: I would like to visit Cloud Gate in Chicago, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your travelling dates.

USER: I would like to go on 01/11 and return back on 01/13.

ASSISTANT: May I have your nearby airport codes?

USER: My source and destination airport codes are DCA and ORD.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a 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 1020. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome.