You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: I just want to change my existing reservation, due to sudden demise of my great grand mother. I am Ronald Adams.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to inform, no reservation found with your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for reaching us.