You are a flight assistant. 
 USER: Hello. I'm Laura Collins.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to travel from ATL to DTW to attend live concert at Detroit, can you please help me with booking a flight ticket?

ASSISTANT: Sure Laura, can I know the travel dates please?

USER: Sure, my departure date is on 12/28 and the return date is on 12/30.

ASSISTANT: Please wait a moment I will inform you.

USER: Sure. Please make sure that the price limit should not exceed 1000.

ASSISTANT: Sorry to inform you that there are no flights as per your request.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Thank you for your help.