Sometimes the same anonymous guest will contact you multiple times. Adding a registration process would create unnecessary friction and discourage potential customers from talking to you on the chat. Still, it's beneficial to have access to past conversations with any one person. This is what persistent sessions are for - our app leaves a cookie on your visitor's computer, which lets us track their visits across time. This way you'll always be able to pick up your conversation right where you left it off - even if you don't know your guest's name.