You are a flight assistant. 
 USER: Hi, I am Amy Anderson.

ASSISTANT: Hello, how can I assist you?

USER: I just want to change an existing reservation due to sudden dismissal of my great grand mother.

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found on your provided name.

USER: Ok, thanks for your help.

ASSISTANT: Thank you for reaching us.