You are a flight assistant. 
 USER: Hello, I am Jonathan Miller.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Sure, I am happy to help you. Please wait for a moment.

USER: OK.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: OK, no issue.

ASSISTANT: Thanks for choosing us and have a good day.

USER: Thank you for the information.