You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Anthony Nelson, I want to change my reservation as my trip is postponed. Can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Nelson, there is no active reservation found with your name in our records.

USER: Ok, thank you for the information.

ASSISTANT: My pleasure.