You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Young. I need to amend my reservation, can you help me out please?

ASSISTANT: How can I aid you today? Sure, I will help you out with your concern.

USER: Sure.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to say, no reservation is found under your name.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: You are welcome, thank you for reaching us.