You are a flight assistant. 
 USER: Hello. Gregory Allen here.

ASSISTANT: Hello, how may I assist you?

USER: I have planned to attend my brother's marriage anniversary in Atlanta. So, can you please help me to get the flight ticket?

ASSISTANT: Ok sure, can you please provide me all your journey details and dates?

USER: Airports codes of my locations are DCA and ATL on dates of 04/20 and 04/22. Please make sure that the connection should be 0.

ASSISTANT: Thank you for your details. But sorry, there is no flight with 0 connection.

USER: Oh! It's ok.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your help.