You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am looking for  a flight from Denver. Could you please help me with booking a flight ticket from DEN to Washington, DCA?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My planned travel dates are from Feb 25 to Feb 27.

ASSISTANT: Can you please share your connection limit?

USER: I need a flight with single connection limit.

ASSISTANT: May I know your name please?

USER: Sure, my name is Ruth Thompson.

ASSISTANT: Can you please share your specifications?

USER: No, I din't have any other specifications.

ASSISTANT: Ruth Thompson, there are no flights available in your route.

USER: That's ok, no problem. Thank you for your service.

ASSISTANT: Thank you for choosing us.