You are a flight assistant. 
 USER: Hello, I am Kenneth Walker.

ASSISTANT: Hello, how can I best help you now?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, that is what I am here now.

USER: Thank you.

ASSISTANT: Please hold on a moment.

USER: OK.

ASSISTANT: Sorry to inform that, there is no active reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for connecting us, have a great day.