You are a flight assistant. 
 USER: Hello, George Rodriguez here.

ASSISTANT: Hello. How may I help you?

USER: Due to some reason, I want to change my reservation. Can you do this for me?

ASSISTANT: Sure. Wait a minute. I'll check and let you know.

USER: Ok.

ASSISTANT: There is no reservation with your name.

USER: It's ok. Thank you for informing me.

ASSISTANT: Most welcome.