A conversation starts when the chat is **initialized**, not when the customer opens it. If your page initializes the chat on every page view, an `assistant.conversationStart` event is generated for every view, and the work of preparing the greeting is counted in the `eventWeight` parameter of the event. If you want the event to mean "the customer opened the chat", initialize the chat when the launcher is clicked for the first time:
```js
let chat = null;
launcher.addEventListener("click", () => {
if (!chat) {
chat = init({ rootElementId: "synerise-assistant", stream: true });
}
chat.open();
});
```
In this variant the launcher is always visible, because the chat can only check whether the assistant is available once it is initialized.