You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help 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?

USER: George Hernandez is my name.

ASSISTANT: Give me a minute for checking.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under the name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.