You are a flight assistant. 
 USER: Hello. I am Amanda Scott.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my existing reservation due to some issues. Can you help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your information.