How to read the area where the voice command was activated?

Configuration Voice Assistant
2

Ok, found the solution myself. If anyone is interested.

The area of the triggering device (e.g. the HA voice PE) can be read via
area_id(trigger.device_id)

To keep one single automation, i’ve added intents with {area} and some without.
This expression then sets the correct area: if the intent (voice command) has an area set, then use it, else use the area of the device.
{%- set area = trigger.slots.area if trigger.slots.area else area_id(trigger.device_id) -%}

This is the entire solution if you are interested

alias: Voice - Temperatur im Zimmer

description: >-
  Reads the area from the voice prompt (or the calling device), searches for the first temperature
  sensors and outputs the temperature. The result would be in German - Es ist
  19.5 Grad im Wohnzimmer

triggers:
  - trigger: conversation
    command:
      - Wie (warm|kalt|heiß|kühl) ist es
  - trigger: conversation
    command:
      - Wie (warm|kalt|heiß|kühl) ist es (im|in der) {area}

conditions: []

actions:
  - set_conversation_response: >-
      {%- set area = trigger.slots.area if trigger.slots.area else area_id(trigger.device_id) -%}
      {% set result = states.sensor

      | selectattr('entity_id', 'in', area_entities(area))

      | selectattr('object_id', 'search',
      '^(?!.*(schalter|steckdose|strom)).*_temperature$')

      | rejectattr('state', 'in', ['unavailable','unknown'])

      | map(attribute='state') | list %}

      {{ 'Es ist ' + result[0] + ' Grad im Raum ' + area if result
      else 'Keine Temperaturangabe im ' + area + ' gefunden' }}


mode: single
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