Integration of third-party chat operators

We plan to connect an external support service for the site, but we are worried about the safety of users' personal data. What is the technically correct way to organize such a process?

We were also very afraid of information leaks when transferring a client chat to a third-party organization. At the negotiation stage, this point was the most important and difficult. As a result, the specialists from simplycontact.com/services/customer-support/call-center-outsourcing/ offered us a secure integration option with separation of access levels. Their employees only see the text of the message and the name, which completely eliminates the risks, while the quality of service does not suffer.