You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I am Susan Gonzalez. My friend birthday party place has been changed to Las Vegas. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a moment. Thanks or waiting, sorry there is no any reservation on your name.

USER: Ok, It's not a problem. Thanks for your response.

ASSISTANT: Thank for reaching us, have a nice day.