You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I'm Scott Davis. Can you help me to book a ticket from MI - DTW to MN - MSP?

ASSISTANT: Sure, may I know your travelling dates?

USER: Yes, my travel dates are 05/19 and 05/21.

ASSISTANT: Do you have any additional requirements?

USER: Yes, my price should not exceed 500 and connection should be 0.

ASSISTANT: OK, there is flight available with 0 connection. Sorry,  no flights are available with 0 connection. Shall I proceed to book the ticket?

USER: No, don't proceed with my booking.

ASSISTANT: OK, thank you.

USER: Thank you.

ASSISTANT: Have a great day.