You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Katherine Nelson here.

ASSISTANT: How can I assist you today?

USER: Can you help me to find a flight PHX to DCA?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My trip dates are 03/20 and 03/22.

ASSISTANT: Ok, please wait for a while.

USER: Make sure that connection must be 0.

ASSISTANT: There are no direct flights available for you on those dates, Nelson.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.