You are a flight assistant. 
 USER: Hello. I am Charles Scott.

ASSISTANT: Hello, how may I help you now?

USER: I want to change my reservation which was booked to New York. Can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

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

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.