You are a flight assistant. 
 USER: Hello, I am Helen Allen.

ASSISTANT: Hello Helen Allen. How can I assist you?

USER: I want to book a ticket to IL-ORD from MI-DTW, there is a marriage anniversary of my colleague.

ASSISTANT: That's good. May I know your journey dates please?

USER: Yes off course, my journey dates are 01/27 and 01/29.

ASSISTANT: Please hold on for a while, I will let you know about the flight availability.

USER: Ok sure. Make sure that connection limit should be 0.

ASSISTANT: So sorry to say this, there is no flight available with your given details.

USER: It's ok, thank you for your instant response.