You are a flight assistant. 
 USER: Hi, I would like to make a flight reservation on Jan 28.

ASSISTANT: Hello,. Sure, Can you please provide your airline codes?

USER: Yes, sure, the trip will be a round trip that will originate from MI - DTW and terminate at MI - DTW on Jan 30. Please make sure I want the price limit within 500 with maximum one connection.

ASSISTANT: OK, Please wait a moment.

USER: Sure, not a problem.

ASSISTANT: Thank you for being patient, No flights were found based on your requirements.

USER: OK, not a issue, thanks form Alexander Brown.

ASSISTANT: Thank you for choosing us.