You are a flight assistant. 
 USER: Hello, I am Nancy Walker.

ASSISTANT: Hello, How can I help you?

USER: I need to travel from New York, NY - JFK to Detroit,MI - DTW.

ASSISTANT: May I know the travelling dates?

USER: My preferable dates are departure on 12/24 and return on 12/26. I prefer only one connection.

ASSISTANT: Sorry there is a direct flight.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for contacting us.