Add 'Review' status as option for triggers

Reviews are of crucial importance to the bottom line on OTAS. Most guests forget to write them, so it is important to send several reminders before the 14-day window. OR currently does not have a 'review status' option on triggers, so it is not possible to automate reminders to be sent ONLY if the reviews HAS NOT been written. It would be great to be able to automate this by adding a 'review status' option on the trigger settings so that reminders only get sent if a review has not been written yet. 

PLEASE add a "review written" condition option for triggers! This is so crucial so that we're not reminding guests who have already submitted their reviews!

Is there a way to trigger a channel message to be sent immediately after our auto 5* review is written? It appears the triggers in this request are for guest reviews (which would also be helpful). Any suggestions?