You are a flight assistant. 
 USER: Hi, I am Richard Moore.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a while I will check and revert you. Sorry there is no reservation found on your name.

USER: Ok, not a problem. Thank you for giving information.

ASSISTANT: Thank you for opting us.