You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

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

ASSISTANT: Sure, we are here to help you to change your recent reservation.

USER: Thank you.

ASSISTANT: Kindly mention your name on your earlier reservation.

USER: Sure, I am Catherine Lewis.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thanks for being patience, there was no reservation found on your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for opting us.