You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am crazy to see White House in Washington, DC-DCA.Can you please help me for booking the flight ticket?

ASSISTANT: That's nice, Please can you mention your source airport code?

USER: Sure, the source code is TX-DFW.

ASSISTANT: Ok, could you please specify your dates of journey?

USER: The travelling dates are from 09/29 to 10/01.

ASSISTANT: May I know your good name please?

USER: Sure, I'm Carol Green here. Make sure that the connection limit should be 1.

ASSISTANT: Sorry, there is no flight with connection limit 1.

USER: Ok, It's no issue. Thank you.

ASSISTANT: Thank you for choosing us. You are welcome.