You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am Kenneth Hernandez. I am planning to book a ticket from DCA. Can you please help me out?

ASSISTANT: Sure, can you please share your destination airport code?

USER: My destination is ORD.

ASSISTANT: May I know your planned dates of journey please?

USER: I would like to travel on 12/11 and return back on 12/13.

ASSISTANT: Wait a moment please.

USER: Make sure my connection limit is 0. Ok.

ASSISTANT: Kenneth Hernandez, there is no direct flight available on your provided route.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for approaching us.