You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

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

USER: Ok.

ASSISTANT: Thank you for waiting. No reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.