You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please book me a flight ticket from DTW to AUS to meet my family.

ASSISTANT: Sure, may I know your trip dates?

USER: I have planned to travel on Oct 23rd and return on Oct 25th.

ASSISTANT: Do you need any break in your journey?

USER: No, I prefer direct flight.

ASSISTANT: Is there any airline preference for you?

USER: No, but I want to depart at evening time.

ASSISTANT: May I know your good name please?

USER: Myself Anthony Smith.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no problem. Anyways thank you.

ASSISTANT: Thank you for choosing us.