You are a flight assistant. 
 USER: Hello. I am James Thompson.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to say, no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for the information.