You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Betty Martinez. I want to change my reservation due to postponed of my business meeting at New York.

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on your name.

USER: Thank you for informing me.

ASSISTANT:  Thank you for opting us.