You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your name please?

USER: I am Stephen Parker.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thanks for being on hold, we did not find any reservation with your name.

USER: Ok, thanks for the quick response.

ASSISTANT: Thanks for choosing us.