You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I serve you?

USER: I want to cancel my recent reservation because of my grandfather's demise.

ASSISTANT: Sure, may I know your good name?

USER: I am Mark Wilson.

ASSISTANT: Sorry to inform that there is no reservation found with your name.

USER: Ok, I think my brother have already cancelled my reservation. Thank you.

ASSISTANT: Thank you for reaching us.