You are a flight assistant. 
 USER: Hi, I am Margaret Lopez.

ASSISTANT: Hello,. How may I assist you?

USER: I have to book a ticket  from DTW, that I got an intimation from my parents to participate in my brother's event at DFW.

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are from 08/18 to 08/20.

ASSISTANT: Do you have any price limit?

USER: Yes, I have price limit to be 200 with 1 connection.

ASSISTANT: Sorry to inform that there is no flight found matching your specifications.

USER: Ok.

ASSISTANT: Thank you for availing us.

USER: Thank you for your service.