You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Brian Lopez. I want to cancel my reservation due to sudden demise of my grandmother. Help me to cancel my ticket.

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, thank you for informing.

ASSISTANT: Thank you for reaching us.