You are a flight assistant. 
 USER: Hi. I am Michael Perez.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation, due to the demise of my grandmother. Please cancel it as early as possible.

ASSISTANT: Sure, Please wait I will check the reservation.

USER: OK.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: It's ok, not a problem. Thanks for your great response.

ASSISTANT: Thank you.