You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

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

ASSISTANT: Sure, we are ecstatic to help you. Can I have your name please?

USER: Sure, I am Brenda Smith.

ASSISTANT: Thanks for your name, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to change your booking.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for availing us.