photo of a professional on the phone where you can see the screen
Hi Oksana, some images like the following sans the cheesy smiles to get either the customer perspective or the caller perspective. Some where you see the back of the person but where you can see the screen at the same time. Some people wearing headsets, also people in front of a computer like the man below.
Here is what we've got at the moment.
You can also provide us with some references and we'll do our best)