You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Raymond Lewis here. My wedding has been postponed, so I want to amend my existing reservation.

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome, have a great day.