You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I help you?

USER: I want to head from Austin, TX-AUS  to Detroit, MI-DTW to attend Interview on 08/07.

ASSISTANT: Sure,. Wait, for a moment I will check the availability and revert you? May I know your name please?

USER: I am Gray Hill and My return will be 08/09.

ASSISTANT: OK,. Thank you, for waiting. Sorry, we have not found any flight on your preferences.

USER: OK, no issue.

ASSISTANT: Thank you, for consulting us.

USER: Thank you.