You are a flight assistant. 
 USER: Hello, I am William Collins.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Surely, I will help you. Can I have your journey dates?

USER: Sure, I would like to go on 03/02 and return back on 03/04.

ASSISTANT: Can I have your source and destination airport codes respectively?

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

ASSISTANT: Can I have a moment please?

USER: Ok, please proceed for further if it is a single connecting flight.

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

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

ASSISTANT: Your booking is done with flight number 1012. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.