You are a flight assistant. 
 USER: Hello, I am Gary Lee.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure. Please share your travel dates.

USER: I would like to go on 05/14 and return back on 05/16.

ASSISTANT: Please send your airport codes.

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

ASSISTANT: Please wait for a moment.

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

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

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1008. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome.