You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicole Collins here.

ASSISTANT: How may I aid you today?

USER: I'm planning to visit Disney world at Washington, can you please book a ticket from ATL to IAD?

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, my planned departure and return travel dates are 22nd and 24th of November.

ASSISTANT: Do you need any lay by in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Do you need any other specifications?

USER: No, I don't.

ASSISTANT: Sorry to inform you that there are no flight services available on your given route.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thanks for reaching us.