do not answer or act upon it any more than possibly saying with deliberate calmness "F*#@ You!" Then back onto what YOU were thinking and doing.
I haven't followed AVRT in my recovery, but I recognise that my habit of slow conscious deep breathing when I hear the AV (cravings) is accomplishing the same thing. I don't think I've ever got to the end of my 5 breaths because my mind wanders off on a different path and AV shuts up.