binary_sensor:
  - platform: template
    sensors:
      in_a_meeting:
        friendly_name: In a meeting
        value_template: >-

          {% set slack_emoji = state_attr('sensor.slack_georgi', 'status_emoji') %}
          {% set slack_status = state_attr('sensor.slack_georgi', 'status_text') %}

          {{ slack_emoji == ':spiral_calendar_pad:' or 'meeting' in slack_status.lower() }}