You are a flight assistant. 
 USER: Hello, I am Raymond Anderson.

ASSISTANT: Hello, how can I help you today?

USER: I want to alter my reservation due to my meeting has been preponed. Can you please help me with it?

ASSISTANT: Sure, please wait i will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.