synology calendar entries via alexa

Hello to all, first of all a happy new year to you and all my best wishes.
i hope someone can help me with the problem.
i did already connect the synoogy calendar via caldav with homeassistand and i can see the next appointments on my dashboard.
The question is if its there a way to ask alexa for the next events?
i did try it with creating this automation but its not working.

alias: Termine für morgen abfragen
sequence:
  - data:
      entity_id: calendar.my_calendar
      start_time: "{{ (now() + timedelta(days=1)).replace(hour=0, minute=0, second=0) }}"
      end_time: "{{ (now() + timedelta(days=1)).replace(hour=23, minute=59, second=59) }}"
    action: calendar.list_events
  - data_template:
      target: "{{ states('sensor.last_alexa_device') }}"
      message: >
        {% set events = state_attr('calendar.my_calendar', 'all_day') %} {% if
        events %}
          Morgen hast du folgende Termine: {{ events | join(', ') }}.
        {% else %}
          Du hast keine Termine für morgen.
        {% endif %}
    action: notify.alexa_media
description: ""

Thx for your halp and sorry for my bad english its not my main language.

I did something like that with an intent script:

  CustomCalendarTomorrow:
    action:
      - service: calendar.get_events 
        target: 
          entity_id: calendar.my_calendar 
        data: 
          start_date_time: "{{ (now() + timedelta(days=1)).strftime('%Y-%m-%d 00:00:00') }}"
          end_date_time: "{{ (now() + timedelta(days=2)).strftime('%Y-%m-%d 00:00:00') }}"
        response_variable: diary
      - service: script.willow_tts_response
        data:
          tts_sentence: >-
              {% if states('sensor.number_of_events_tomorrow') | float(0) > 0 %}
              Tomorrow you've got, 
              {% for event in diary['calendar.my_calendar'].events %} 
              {{ event.summary }}.
              {% endfor %}
              {% else %}
              Nothing tomorrow.
              {% endif %}

script.willow_tts_response plays tts_sentence through a media player.

Is your synology calendar working correctly in HA? I did the same thing as you, using the caldav integration. It worked, but I kept getting error messages about it not being a valid ics file.

Yes my synology Calender is working well. The only problem is that i dont get an answer from alexa if i ask for my next events.

Its still not working.
Anyone else have an idea?