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

ASSISTANT: Hello, thank you for connecting with us. How can I help you?

USER: Can you help me to book a flight?

ASSISTANT: Sure, please tell your journey details?

USER: It is very important for me to attend a seminar at MCO from DTW. My travelling dates are 12/01 and 12/03.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, please check the flight. My price limit is 200.

ASSISTANT: I'm really sorry, I didn't find any flight regarding your requested dates.

USER: Oh! ok.

ASSISTANT: Thank you and have a nice day.

USER: Thank you for your time.