You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Usually I prefer a connecting flight, but unfortunately my friend have already reserved my ticket with a direct flight. So, I want to change it.

ASSISTANT: Sure, kindly mention your name to change it.

USER: Sure, you can check the reservation on the name of David Smith.

ASSISTANT: Thanks for providing your name. Please hold on.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for opting us.