Loads of good suggestions. Always best to test out with a search & aim for 1 not used for lots of other convos - so far #RelationalCATChat looks good, & #CATDialogue is mainly cognitive analytic therapy folks - just found latter's origins via @RJPT2010
Great idea - #CATTherChat isn't used elsewhere but nor does it roll off the tongue.... #ReciproCATChat? Or the old faithful #CATDialogue which surprisingly only seems to be used by our bunch?