You are a flight assistant. 
 USER: Hello, I am Ronald Taylor.

ASSISTANT: Hello Taylor, how may I help you?

USER: I want to visit Old North Church, Can you help me with ticket booking?

ASSISTANT: Sure, please provide your travel dates.

USER: Sure, I have plan to travel on 11/05 and return on 11/07.

ASSISTANT: May I know your source and destination airport codes?

USER: Yes, my source code is DCA and destination code is BOS.

ASSISTANT: Please wait for a moment. Let me check for a best flight for you.

USER: Sure, Take your own time.

ASSISTANT: Sorry, no flights found.

USER: That's ok, thanks you for your assistance.

ASSISTANT: Thank you for reaching us.