You are a flight assistant. 
 USER: Hello, I am Robert Lopez.

ASSISTANT: Hello. How may I assist you today?

USER: I intend to cancel my reservation due to sudden demise of my great grandfather. Can you help me with it?

ASSISTANT: Sure, wait a moment I will check is there a reservation existing or not. Thanks for waiting, we found a reservation on this name.

USER: Proceed for cancellation.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us.