You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER:  I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need to cancel my reservation.

ASSISTANT: Ok, may I know your name please?

USER: Sure, my name is Kimberley Martinez.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for opting us.