You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you aid me in booking a flight ticket from DEN to IAH?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I would like to go on Mar 22nd and return back on Mar 24th.

ASSISTANT: Ok, could I have your name please?

USER: Myself Scott Green.

ASSISTANT: Ok, do you need any direct or connecting flight?

USER: Ensure it is a single connecting flight.

ASSISTANT: Sorry, there is no flight with your requested travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a great day.