You are a flight assistant. 
 USER: Hello. I am Christopher Hernandez.

ASSISTANT: Hello, how can I aid you today?

USER: I want to cancel my reservation due to postponed of my client meeting.

ASSISTANT: Sure Hernandez, please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation done previously on your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for approaching us, have a nice day.