You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Mary Rodriguez here. Due to demise of my great grandfather, I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure Mary, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry Mary, there is no reservation found as per your name to cancel it.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: You are welcome.