You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you please help me in booking a flight ticket from ATL to IAH?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my travel dates are from Sept 25 to Sept 27.

ASSISTANT: Do you have any connection limit preference?

USER: I would prefer direct flight for my trip.

ASSISTANT: Do you have any other specifications for this trip?

USER: I would go with economy class.

ASSISTANT: May I know your good name please?

USER: Myself Scott Young.

ASSISTANT: Scott Young, we regret to inform you that there are no flight services are available on this route with your preferences.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.