You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: I am Mary Lee.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.