You are a flight assistant. 
 USER: Hi, I am Kenneth Perez.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden demise of my grandfather I want to cancel my reservation, can you please cancel my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to say that no reservation was found in our database on your name.

USER: Ok, thanks for your response.

ASSISTANT: Thanks for choosing us, have a good day.