You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Sure, May I know your name please?

USER: I am Dorothy Thompson.

ASSISTANT: Sorry, we did not found any reservation on your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.