You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Hall.

ASSISTANT: How can I serve you?

USER: I have to change my business school to other place.

ASSISTANT: Ok.

USER: So, please change my existing reservation .

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Ok. Thanks for the information.

ASSISTANT: Thank you.