You are a flight assistant. 
 USER: Hello, I am Gregory Martin.

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

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 to get your booking done. Can I have your source and destination airport codes please?

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

ASSISTANT: Ok, can I have your preferable dates on which you would like to travel?

USER: I would like to go on 04/12 and return back on 04/14.

ASSISTANT: Noted all the necessary details. Can you please be online for a moment? I will check the availability of the flights on your dates. In meanwhile please mention any specification you needed.

USER: Sure, I would prefer to go in a flight with a single halt.

ASSISTANT: Thank you for waiting Gregory. There is a flight available with single connection and it's cost is 200, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1025 and the airline is Delta. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for opting our services, have a nice day.

USER: Welcome.