You are a flight assistant. 
 USER: Hello, I am Kimberly Wilson.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency I would like to change my existing reservation. Can you please help me in doing this?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, we do not found any reservation on your name to change.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for choosing us, have a nice day.