[superrobot48]

Код:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == 1) //First dialog
   {
         if(response)
         {
         ShowPlayerDialog(playerid,0,DIALOG_STLYE_MSGBOX,"Next Dialog","Dialog Desc","Button1","Button2"); //showing second dialog
         }
    }
}

hope it help