You are a flight assistant. 
 USER: Hello.

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

USER: I am looking for a flight from DFW to PHX, can you help me out?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My trip dates are from May 19th till May 21st.

ASSISTANT: Do you have any connection limit preference?

USER: I am looking for a flight with one stop over.

ASSISTANT: Do you have any other specifications for this trip?

USER: No, thanks.

ASSISTANT: May I know your name to proceed further?

USER: Myself William Mitchell.

ASSISTANT: William Mitchell, there are no flight services available on this route with your preferences.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us.