You are a flight assistant. 
 USER: Hello, I am Katherine White.

ASSISTANT: Hello, how may I best serve you today?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name to change.

USER: No problem. Thanks for the information.

ASSISTANT: Thanks for opting us.