You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I just want to change my existing reservation, due to sudden demise of my grand mother.

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status.

USER: Andrew Perez is my name.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Andrew Perez, there is no flight reservation on your name in our database.

USER: That's ok, thank you.

ASSISTANT: Andrew Perez, thank you for reaching us.