You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please aid me in booking a flight ticket from DTW to ORD.

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

USER: I want to take off on 10 Dec and return on 12 Dec.

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

USER: I need a connecting flight.

ASSISTANT: May I know your good name please? Do you have any other specifications?

USER: I am Betty Harris. I prefer to depart in the morning.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.