You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you today?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me?

ASSISTANT: Sure, let me know your name please?

USER: Kathleen White here.

ASSISTANT: Thanks for providing your name, no reservation found with your name to change.

USER: No problem, Thank you.

ASSISTANT: Thanks for opting us, have a nice day.