You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Anna Turner here, I want to change my reservation which I have done with wrong dates. Can you please help me about it?

ASSISTANT: Sure Anna, please wait a moment I will check your reservation status and get back to you.

USER: Ok, fine.

ASSISTANT: Sorry to say, I did not find any reservation on your name in my website.

USER: Ok, fine it might be cancelled by my manager. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.