You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself William Moore, I want to visit LAX. Can you book my ticket from ATL?

ASSISTANT: Can I know the dates of travel?

USER: From 09/30 to 02/02.

ASSISTANT: Hold on for a moment. I'm sorry William, there are no flights matching your preferences.

USER: Oh. That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your time.