You are a flight assistant. 
 USER: Hi, myself Paul Brown.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend Conference on Social Issues at Cobo Centre in Detroit, MI - DTW. Can you be my helping hand in booking a flight ticket within the range of 200?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Let me know when you are willing to travel?

USER: My travelling dates are from 03/24 to 03/26.

ASSISTANT: May I know your source point?

USER: I want to depart from Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for approaching us.