You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Gary Jackson, I want to change my reservation as my plan for vacation is postponed. Can you help me with that?

ASSISTANT: Sure, wait a minute.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.