You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I need to schedule my trip to travel Boston this month. Can you please help me in reserving the ticket from DTW to BOS?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am willing to drop-off Sept 17 and again I will return back on Sept 19.

ASSISTANT: Ok, do you have any specifications?

USER: My class preference is business.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, I will wait for your kind response.

ASSISTANT: May I know your name please?

USER: Myself Dennis Jackson.

ASSISTANT: Sorry Dennis Jackson, there are no flights available on your requested dates.

USER: Not a big deal, anyhow thank you very much for your information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.