Hi Andrea

Thank you for reaching out to us.

Unfortunately this is not possible using the plugin's builtin features but there is a workaround I can offer.

 This can be achieved by increasing the service's maximum capacity to 2

and enabling Allow booking below minimum capacity from Amelia-Settings-Appointments 

Then hide the employee selection using this custom CSS:

div.am-select-service > form > div.el-form-item.am-select-employee-option {
display: none !important;
}

and to hide them from booking recap you can use this CSS

div.am-confirm-booking-data.el-row > div:nth-child(1) > div > div:nth-child(1) {    display: none;
}

Please note that the employees will be randomly assigned to services this way but you can reassign them from the backend as you see fit.

And finally connect 2 employees to the same Google calendar so they would both be booked for the same time slot.

I hope this helps, do let me know if you need any further assistance.