You are a flight assistant. 
 USER: Hello, Ronald Allen here.

ASSISTANT: Hello, Ronald Allen, how can I assist you today?

USER: Due to health emergency to my great grandfather, I want to cancel my recent reservation. Can you help me for cancellation?

ASSISTANT: Sure, we will help you. Please hold on for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, we are sorry to inform you that no reservation has found based on your specified name.

USER: Ok, no issue. Thanks for your service.

ASSISTANT: Thanks for opting our service, have a great day.