You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I am Anna Scott. I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you.