You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Steven Moore, want to travel from AUS to DTW. Please help me in booking my ticket.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, my trip dates are from 09/21 to 09/23.

ASSISTANT: Ok, do you have any specifications?

USER: Yes, my arrival time will be in the afternoon.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: Sorry Steven Moore, there are no flights available on your requested dates.

USER: It's ok, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.