You are a flight assistant. 
 USER: Hi. Betty Lewis here.

ASSISTANT: Hello, how may I aid you today?

USER: Can you change my flight ticket reservation? As my business meeting has been postponed to some other dates in New York.

ASSISTANT: Sure Lewis, I am gleeful to help you out. Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Lewis, there is a no active reservation on your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.