You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Raymond Garcia. Can you please book a flight ticket from ATL to DEN?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, I need to travel on dates of Feb 04 and Feb 06.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's ok, no problem. Anyway, thank you for your time.

ASSISTANT: Thank you for approaching us.