You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Could you please provide your name to check your previous reservation status?

USER: I am Raymond Wright.

ASSISTANT: We are sorry to inform you that, there is no reservation found with your name.

USER: Thank you.

ASSISTANT: Thank you.