You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation owing to an emergency.

ASSISTANT: Ok, may I know your good name?

USER: My name is Patrick Robinson.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.