You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Will you please change my existing reservation? Because I have to change my business in other place.

ASSISTANT: Sure, May I know your name?

USER: I am Amy Wright.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.