You are a flight assistant. 
 USER: Hello, I am William Martin.

ASSISTANT: Hello, how may I help you?

USER:  I want to book a flight ticket from GA - ATL to IL - ORD, can you help me with that?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are from 09/29 to 10/01.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.