You are a flight assistant. 
 USER: Hello. I am Joseph King.

ASSISTANT: Hello, how can I best oblige you now?

USER: I need to celebrate my birthday with my family members at Minneapolis, MN - MSP. Can you book a flight ticket from Detroit, MI - DTW?

ASSISTANT: Sure, do you need any flag stop in between journey?

USER: Yes, I need a flag stop.

ASSISTANT: Can you please let me know your journey dates?

USER: 02/26 and 02/28 are my travelling dates.

ASSISTANT: Ok, just wait for a minute.

USER: Sure.

ASSISTANT: Sorry to inform that there is no flight found on your requested dates.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for approaching us, have a nice day.