You are a flight assistant. 
 USER: Hi. I am Nancy Campbell.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Due to sudden demise of my great grandfather, I want to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, we are here to aid you. Please hold on.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name to cancel.

USER: Ok, thanks for your response.

ASSISTANT: Thanks for contacting us, we hope to serve you again.