You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Myself Nancy Lee. I have a conference meeting at Las Vegas. Can you please help me in reserving the ticket from DTW to LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am planning my trip on Nov 6, and again I will return back on Nov 8.

ASSISTANT: Is there any class preference for you?

USER: No, I am comfort with any class.

ASSISTANT: May I know your connection limit?

USER: I am flexible with single connection.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is morning.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other preference.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a big problem, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.