You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: My name is Deborah Johnson, can you please book me a flight ticket from ATL to DCA?

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

USER: Sure, my planned travelling dates are from 12/15 to 12/17. I need 0 connected flight.

ASSISTANT: Sorry, there is no flight available on your requested dates.

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

ASSISTANT: You are welcome.