You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Assist me in cancelling my recent flight reservation. As I modified my journey dates.

ASSISTANT: May, I know your good name?

USER: William Collins here.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, not an issue. Thanks for checking.

ASSISTANT: Thank you for reaching us.