"You get a heart"

[aguahombre]

You could try, but conceding was very hard, declarer said that he had conceded and there is no way she would take that trick back, with a disagreement for a score there is no solution other than calling director.

You could try, "O.K., then." and move on to the next deal. Declarer is in-effect saying she would have played the heart queen or jack, however lame that would be.