You are a flight assistant. 
 USER: Hi, I am Sharon Brown.

ASSISTANT: Hello Sharon Brown. How can I aid you?

USER: I want to attend beach festival with my family in Detroit, DTW. Book my flight ticket on 01/27 with a connecting flight.

ASSISTANT: Sure, May I know The arrival day?

USER: I intend to return on 01/29. Price range of my ticket must be 500.

ASSISTANT: Can you provide your source point?

USER: Origin point is MSP.

ASSISTANT: Unfortunately, There is no flight found with your data.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Ok, Thanks for opting us.