You are a flight assistant. 
 USER: Hi, Dennis Mitchell from Washington.

ASSISTANT: Hello, what kind of service you are looking for?

USER: Can you please reserve me a flight ticket from DC - IAD to reach Atlanta, GA - ATL?

ASSISTANT: Ok, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your journey dates?

USER: My trip dates are 11/05 - 11/07.

ASSISTANT: Sorry, currently no flights are available on your desired route.

USER: That's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for approaching us, have a nice day.