Facebook has been pushing its messenger real hard so everyone starts using that instead of using the Facebook App to exchange messages. In the recent update to the Facebook Messenger, now you can see all the messages on your Wear device and also reply using voice, if you are comfortable speaking that way and your internet doesn’t ditch you!
Recently WhatsApp enabled the reply from the wear and now this making it possible to communicate on the go without taking out your phone. However I do see the connection times out on FB and WhatsApp though voice translation works just fine when using “OK Google”
That said, if you tried and it worked for you, let us know your experience and if it worked for you. In case you cant see the messages on the wear, jut use the Android Wear app on your phone to sync apps and it should be on the way.