You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your name please?

USER: I am Samantha Perez.

ASSISTANT: How can I be at your service?

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

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name.

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

ASSISTANT: Thanks for opting us.