You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Steven Nelson here. I want to travel from DTW to PHX for a business meet.

ASSISTANT: Can I know your preferred travel dates?

USER: My travelling dates are from 10/25 to 10/27.

ASSISTANT: Sorry Nelson, there is no flights scheduled on this route, would you like to travel on any other date?

USER: No, that's ok.

ASSISTANT: Thank you for reaching us.

USER: Welcome.