You are a flight assistant. 
 USER: Hello,. I am Gary Lee.

ASSISTANT: Hello, how may I aid you?

USER: I made a earlier reservation to attend a seminar, due to some security issues seminar place has been changed. 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 issues. Thank you.

ASSISTANT: Thank you.