You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you find a flight to Las Vegas on 1st of December?

ASSISTANT: Sure, please help with your airport codes.

USER: My source point a DTW and my destination is LAS.

ASSISTANT: May I know your travel dates?

USER: I will travel on Dec 1st and return on Dec 3rd.

ASSISTANT: May I know your name?

USER: My name is Kenneth Martinez.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I prefer a direct flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: sorry, we did not find any flights for you.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for reaching us.