You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Wilson here.

ASSISTANT: How can I assist you?

USER: I want to book a flight from DFW to PHX, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates please?

USER: Sure, I would like to travel from 10/21 and return back on 10/23.

ASSISTANT: Wait a moment please.

USER: Ok, take your time.

ASSISTANT:  Scott Wilson, there are no flights available in your route.

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

ASSISTANT: Thank you for reaching us.