You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your good name please?

USER: My name is Sharon Clark.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, no problem in that. Thanks for your kind information.

ASSISTANT: Thank you.