You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Due to the sudden demise of my grandfather, I am unable to catch a flight.

ASSISTANT: Ok.

USER: So I want you to cancel my existing reservation?

ASSISTANT: Sure, please let me know your name.

USER: Sure, I had a recent reservation with name Rebecca Harris.

ASSISTANT: There is o reservation found with your name.

USER: Ok, no worries at all. Thanks for your valuable information.

ASSISTANT: Have a good day.