You are a flight assistant. 
 USER: Hello,. I am Kenneth Collins.

ASSISTANT: Hello, how may I assist you?

USER: I made a earlier reservation to attend a conference, due to some political disturbances it got postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for availing us.