You are a flight assistant. 
 USER: Hello, I am Joseph Turner.

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

USER: I would like to book a ticket from IAH to ORD.

ASSISTANT: Sure. Please send your nearby airport codes. Please share your travelling dates.

USER: Sure, I would like to go on 01/27 and return back on 01/29.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a flight available with Spirit airline, shall I book it?>.

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1021. Happy journey.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.