That was the problem, many thanks
For all who have the same problem, here is the right intent config:
Ping:
action:
service: script.turn_on
target:
entity_id: script.{{ pings | replace(" ", "_") }}
speech:
type: plain
text: Ping erfolgreich
But with the smart home integration you got all scripts/scenes as devices. Thats too much for me within Alexa. So it is better for me to work with intents.
Thanks a lot for fast help!