Tell Amazon Alexa to Close Garage via MyQ subscription service for LiftMaster (aka Chamberlain). For this to work you need to have the MyQ wifi hub/bridge configured properly and linked to your garage opener. The command to say is "Alexa trigger close garage". Unfortunately you can't open the garage due to restrictions by LiftMaster (they only let you close, but not open!).
Explore more great ways to automate MyQ and Button widget