You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking me a flight from DTW to reach ORD?

ASSISTANT: Sure, can you please share your travel dates?

USER: Thank you, my travelling dates are Dec 28th and Dec 30th.

ASSISTANT: May I know your connection limit?

USER: I prefer a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I like to travel in economy class flight.

ASSISTANT: Ok, please let me know your name.

USER: Gary Allen is my name.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.