You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Help me to book a flight ticket from ATL to ORD.

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are July 22 and July 24.

ASSISTANT: Do you have any limit on maximum number of connections?

USER: Single connective flight is required.

ASSISTANT: May I know your class preference for the journey?

USER: Any class is ok for me.

ASSISTANT: Do you have any more specifications for your trip?

USER: No, I don't have any other specifications.

ASSISTANT: Let me know your name to proceed further for documentation purpose.

USER: Joseph Williams here.

ASSISTANT: sorry for the inconvenience, we have not found any flights running on your routes.

USER: Ok, not an issue. Thanks for checking.

ASSISTANT: Thank you for opting us.