You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to travel in a business class flight, can you please reserve a flight ticket from ORD to DTW?

ASSISTANT: May I know the itinerary travel dates?

USER: Thank you, my boarding is on Dec 20 and return back on Dec 22.

ASSISTANT: Is there any connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Are there any more preferences?

USER: No.

ASSISTANT: May I know the name please?

USER: Sure, my name is Richard Hill.

ASSISTANT: Sorry to inform that there are no flights on your route withe the provided dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.