You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to fly from LAX to DTW, as there is a seminar meeting to attend. Can you help me in booking?

ASSISTANT: Yes, I can help you. Can you tell me your dates of travel?

USER: My trip dates are Dec 1 to Dec 3.

ASSISTANT: Do you have any other specifications?

USER: I prefer a normal-cost airline in a business class.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight which depart in afternoon.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No issue, thank you.

ASSISTANT: Can I know your name for documentation?

USER: Sure, I am Joseph Hall.

ASSISTANT: Thank you for contacting us.