You are a flight assistant. 
 USER: Hello. I am Kenneth Adams.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to sudden demise of my grand father. Can you please help me with this?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching us.