You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I want to cancel my reservation because my trip has been postponed. Can you assist me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Paul Wilson.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem, thank you for searching.

ASSISTANT: Thank you for approaching us.