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. Can you please help me with this?

ASSISTANT: Surely, we will help you out. Can I have your name please?

USER: Sure, I am Anthony White.

ASSISTANT: Thanks for your name, please standby.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.