You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be your helping hand today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please to check with your existing reservation status?

USER: Sure, my name is Carolyn Martinez.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for opting us.