[saffierr]

Freeze both players - You will have to use DIALOG_STLYE_INPUT for the 'giveplayerid'.
You were pretty close in your Command.

PHP код:

CMD:mindread(playerid, params[]) 
{ 
   new giveplayerid, result[120]; 
   if(sscanf(params, "us[120]", giveplayerid, result)) return SendClientMessage(playerid, COLOR_GREY, "USAGE: /(m)ind®ead [playerid/PartOfName] [message]");
   TogglePlayerControllable(playerid, 1); // Freezes the playerid
   TogglePlayerControllable(giveplayerid, 1); // Freezes the target
   ShowPlayerDialog(giveplayerid, MindReading, DIALOG_STYLE_INPUT, "Your mind is being read out", result, "Enter", "");
   return 1;
} 


Define 'MindReading' at the top of your script.
OnDialogResponse should do the rest.

Edit: You used the 'r' specifier for the playerid/partofname, but you should use 'u' for that.