You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: Please book a flight ticket from ATL to ORD?

ASSISTANT: Sure, we will help you out. Let me know your planned dates.

USER: My journey dates are Aug 02 and Aug 04.

ASSISTANT: May I know your good name please?

USER: I am Gary Moore.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other concerns?

USER: No.

ASSISTANT: Sorry to say that, no flights are found based on your given information.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.