You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: My name is Raymond Hill.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Thanks.

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