You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you aid me in booking a flight ticket from DCA to DEN?

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

USER: Sure, I would like to go on Jan 03rd and return back on Jan 05th.

ASSISTANT: Can you please share you connection limit?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: May I know your name please?

USER: Myself Nicole Thompson.

ASSISTANT: Do you have any other specifications?

USER: Ensure it is in the business class.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.