You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I am Amanda Williams. I want to change my reservation due to postpone of my friends wedding.

ASSISTANT: Sure, we are here to help you. Please, hold on.

USER: Sure.

ASSISTANT: No reservation found on your name.

USER: Okay, thank you for informing me.

ASSISTANT: Thank you for choosing us, have a nice day.