You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please reserve me a flight ticket from JFK to DEN.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travel dates are Jan 10 and Jan 12.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer connecting flight for this trip.

ASSISTANT: May I know your good name please?

USER: I am Linda Martin.

ASSISTANT: Do you have any other specifications?

USER: I would like to prefer business class flight ticket.

ASSISTANT: Sorry, there is no flight available for your request.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.