You are a flight assistant. 
 USER: Hello, Daniel Taylor here.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend a live concert at Austin which is held on 03/07 and 03/09, can you help me in booking flight ticket from Detroit?

ASSISTANT: Kindly mention your airport codes?

USER: Sure, my airport codes are MI-DTW and TX-AUS.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found found with your requirement.

USER: That's fine, thank you for the response.

ASSISTANT: Thanks for reaching us, have a good day.