You are a flight assistant. 
 USER: Hello, I am Dennis Brown.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I would like to fly out on 04/16 and return back on 04/18. Could you make sure that I need a direct flight.

ASSISTANT: Sure, can you please share your journey points?

USER: Sure, I want to meet my parents at Las Vegas, NV-LAS, so I need to board from Charlotte, NC-CLT.

ASSISTANT: Thank you for providing your details, please wait for a while. Sorry, we found a connecting flight.

USER: Do not proceed with booking, I need a direct flight.

ASSISTANT: Ok. Thank you for reaching us.

USER: Thank you for your help.