You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: As my grandmother has expired, I want to cancel my reservation.

ASSISTANT: Sure, can I know your good name for checking?

USER: Brian Martinez here.

ASSISTANT: Please wait for minute to check it.

USER: Sure.

ASSISTANT: Sorry Brian, there is no reservation found in our database.

USER: It's ok.

ASSISTANT: Thank you for your approach.

USER: Thank you for helping me.