Hello Raffaele,

I am sorry for the inconvenience. You need to customize it. This is beyond our support.

-Regards

As alternative solution I can suggest - find live chat service which is the most popular in your country, then check their website - they always have a ready plugin or script to embed.

for example: https://www.revechat.com/blog/live-chat-scripts-customer-service-phrases/

Many users as I know use that one: https://www.tawk.to/