You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Owing to an emergency, I want to change an existing reservation, so please help me in the cancellation.

ASSISTANT: Sure. May I know your name please?

USER: Myself Jeffrey Lopez.

ASSISTANT: Thanks for your time. There is no flight reservation on your name to change it.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.