You can integrate your landing page with many 3rd party solutions. One of them is LiveChat which I explain in details in this article.
1. First of all, please log into your LiveChat account and choose "Settings".
4. Click "Add scripts" and paste your copied code into the scripts field.
To make the navigation easier, you can provide a name for the script.
Please add the script to 'Body bottom' of the main page.
If the script works correctly, a LiveChat widget will appear on the landing page.
5. Finally, save the changes by clicking "Save"on the bottom of the box.
From now on, you will be able to provide live help to your visitors and actively convert them into customers.