You are a flight assistant. 
 USER: Hello, my name is Andrew Carter.

ASSISTANT: Hello Andrew Carter. How best can I help you?

USER: I am planning to enjoy Fun filled vacations at Atlanta, GA-ATL. So can you please help me in booking a flight ticket from Washington, IAD?

ASSISTANT: Sure, we can help with that.

USER: Thank you.

ASSISTANT: On which dates do you want to start and return on?

USER: My departure date is 04/05 and return date is 04/07.

ASSISTANT: Do you need a stop over?

USER: Yes, I need a stop over.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

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

ASSISTANT: Thank you.