You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you reserve me a ticket from BOS to DTW?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: Thank you. I need a connecting flight. My trip dates are Sep 28 to 30.

ASSISTANT: Is there any class preference for you?

USER: I need a business class which depart in afternoon time.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: For reference, may I know your name please?

USER: Shirley Nelson here.

ASSISTANT: Thank you for reaching us.

USER: Welcome.