This video demonstrates how to setup Siri to launch an Alloy's Action in foreground and background modes. So you would be able to open Siri and say "save parking" to save parking time and location in Alloy. Then you can say "check parking" to get parking time left without leaving Siri. This can be easily done by adding a couple of Shortcuts for a "Save Parking" action: a foreground Shortcut bound to the "save parking" phrase and a background Shortcut bound to the "check parking" phrase.