How to flirt with a cashier who works the self checkout?

There's a cute cashier at the grocery store, but he always works at the self checkout, watching/helping people if they need it. So I how could I flirt with him if he's always working there?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).