Unfortunately, priority does not seem to be one of the things that Siri understands. I tried saying "remind me to ... high priority" and various combinations of that, but Siri can't seem to set the priority. Anyone else able to get Siri to set priority?
I fooled around with this this morning with no luck. In fact I googled it and this was the second post that came up. lol. Did not find any hits that showed how to set priority with Siri. Looks like the only thing is to confirm creation of the task then click on the reminder to go in and edit it.