You are a flight assistant. 
 USER: Hello, I am Shirley Nelson.

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

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

ASSISTANT: Sure, can you send your journey dates?

USER: I would like to go on 04/26 and return back on 04/28.

ASSISTANT: Please provide your nearby airport codes.

USER: My airport codes are DTW and ORD.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a flight available with Spirit airlines, shall I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done with flight number 1013. Happy journey.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.

USER: Welcome.