You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are 05 to 07 of Oct.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Joseph Harris.

ASSISTANT: Sorry, no flights found on your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.