You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, may I know your name for checking?

USER: I am Kathleen Jones.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name .

USER: Thanks.

ASSISTANT: Thank you for opting us.