You are a flight assistant. 
 USER: Hi, I am Elizabeth Taylor. I would like to visit Detroit to attain my sister-in-law's birthday.

ASSISTANT: Hello, we are glad to serve you. Sure, can I have your airport codes and dates of travelling?

USER: My journey will start from Chicago, IL - ORD on 08/10 and will return to Detroit, MI - DTW on 08/12. I want a direct flight with the price limit 1000.

ASSISTANT: Sure, thanks for providing details, please wait for a while, let me check and revert to you.

USER: OK, sure.

ASSISTANT: Thanks for waiting, sorry, unfortunately no flight found on that day.

USER: OK, not an issue. Thank you.