Operator can monitor website and invite prospectives to chat. In "Visitor" section, pick one visitor and click the "Invite" button, a small window will popup. The default greeting message "Hello, Can I help you?" can also be modified easily.
Then the visitor will see a window scrolling down. Visitor may choose "Accept" or "Decline" it.
In 123LiveHelp Admin Panel, there are 8 proactive chat invitation themes to choose.