You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Christine Phillips.

ASSISTANT: Ok.

USER: My friend birthday party place has been changed to Boston. Can you please change my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.