You are a flight assistant. 
 USER: Hello.

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

USER: I am Jack White, want to travel from DTW to PHX. Can you book my ticket?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: Sure, my travelling dates are from  08/15 to 08/17.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: Ok.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: That's fine, I will check with other agency. Anyway, thank you for time.

ASSISTANT: You are welcome.