Here's a rule example. A couple of notes. The trigger switch, in this example "laundry status", is set in the device details to turn off after 1 second, so it is momentary.
Since I use the official Alexa TTS method, my rule triggers virtual motion sensors using custom code. Alexa reacts to this virtual motion sensor being triggered, and speaks the phrase specified in that Alexa routine. However, with Google Assistant, you would instead use something like the Chromecast integration or Castweb API to speak the message by specifying it right in the rule.
