You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to conduct a E commerce network meeting at Detroit. Can you please help me in reserving the ticket from LAS to DTW?

ASSISTANT: Sure, can you share me your trip dates?

USER: I am willing to drop-off Mar 31 and again I will be return back on Apr 2.

ASSISTANT: Do you have any connection limit?

USER: I am flexible with direct flight.

ASSISTANT: Is there any other specifications?

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

ASSISTANT: May I know your name please.

USER: Myself Joseph White.

ASSISTANT: Sorry, no flights are found on your trip dates.

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

ASSISTANT: Thank you for reaching us.