You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: Can you book a business class flight for me?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: I will fly on Apr 02 and return on Apr 04.

ASSISTANT: Could you please mention your preferable airport code names?

USER: My source point is DTW and my destination is JFK.

ASSISTANT: May I know your name for further process?

USER: My name is Dorothy Baker.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.