pms/hotel_calendar/views/inherited_res_users_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="view_users_form_simple_modif" model="ir.ui.view">
        <field name="model">res.users</field>
        <field name="inherit_id" ref="base.view_users_form_simple_modif" />
        <field name="arch" type="xml">
            <xpath expr="//group[@name='preferences']" position="after">
                <group string="Calendar (PMS) Preferences" name="preferences_calendar">
                    <group col="8" colspan="4">
                        <field name="pms_show_notifications" />
                        <field name="pms_show_pricelist" />
                        <field name="pms_show_availability" />
                    </group>
                </group>
            </xpath>
        </field>
    </record>

</odoo>