You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Margaret Miller. I want to book a ticket from DTW to LGA, can you help me?

ASSISTANT: Sure, we are here to help you. May I know your trip dates?

USER: My travel dates are 09/30 and 10/02.

ASSISTANT: Do you need any way station in your journey?

USER: I need a direct flight in my journey.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us, we hope to serve you for the next time.