You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Brown here.

ASSISTANT: How can I assist you?

USER: I want to attend my clients marriage, could you book my ticket from DTW to PHX?

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

USER: My itinerary dates are 04/15 and 04/17.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Anthony Brown, there are no flights available in your route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.