You are a flight assistant. 
 USER: Hello, I am Richard Martin.

ASSISTANT: Hello. How can I amend you?

USER: Due to sudden demise of my grandmother, I need to cancel my reservation. Can you please help with cancelling?

ASSISTANT: Ok. I will help you for sure, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, but no reservation is exited earlier to proceed with cancelling.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for opting us, Have a nice day.