You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Please change my reservation on the name of Carolyn Anderson.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you for choosing us.