H System.

CMD:ems(playerid, params[])
{
        new
                emsmsg[128],
                caller[MAX_PLAYER_NAME];
        SendClientMessage(playerid, COLOR_YELLOW, "You have called for the EMS, wait for somebody to come!");
        playerVariables[playerid][pPendingEMS] = 1;
        foreach(Player, i)
        {
            if(playerVariables[i][pGroup] == 2)
            {
            GetPlayerName(playerid, caller, sizeof caller);
            format(emsmsg, sizeof(emsmsg), "[Emergency]"EMBED_OOC" %s has called for the EMS! || /acceptems [playerid]", caller);
            SendClientMessage(i, COLOR_LIGHTRED, emsmsg);
                }
        }
        return 1;
}

CMD:heal(playerid, params[])
{
	new
	    healid,
	    msg[128],
		medic[MAX_PLAYER_NAME],
	    healname[MAX_PLAYER_NAME];

	if(playerVariables[playerid][pGroup] != 2) return SendClientMessage(playerid, COLOR_GREY, "You're not a medic!");

	if(sscanf(params, "u", healid)) return SendClientMessage(playerid, COLOR_GREY, "USAGE: /heal [playerid]");

	else if(playerVariables[playerid][pGroup] == 2)
	{
	SetPlayerHealth(healid, 100);
	GetPlayerName(healid, healname, sizeof healname);
	GetPlayerName(playerid, medic, sizeof medic);
	format(msg, sizeof(msg), "Paramedic %s has healed you!", medic);
	SendClientMessage(healid, COLOR_WHITE, msg);
	format(msg, sizeof(msg), "You have healed %s!", healname);
	SendClientMessage(playerid, COLOR_WHITE, msg);
	}
	return 1;
}

CMD:cancelems(playerid, params[])
{
        SendClientMessage(playerid, COLOR_LIGHTRED, "You have cancelled your call!");
        playerVariables[playerid][pEMSAssigned] = 0;
        playerVariables[playerid][pPendingEMS] = 0;
        return 1;
}

CMD:acceptems(playerid, params[])
{
        new
                msg[128],
                emsid,
                medic[MAX_PLAYER_NAME],
                caller[MAX_PLAYER_NAME],
                Float: x,
                Float: y,
                Float: z;

        if(playerVariables[playerid][pGroup] != 2) return SendClientMessage(playerid, COLOR_GREY, "You're not a paramedic!");
        else if(playerVariables[playerid][pGroup] == 2)
        {
            if(playerVariables[playerid][pEMSAssigned] == 1) return SendClientMessage(playerid, COLOR_GREY, "You're already on an EMS call!");
            else if(playerVariables[playerid][pEMSAssigned] == 0)
            {
                        if(sscanf(params, "u", emsid)) return SendClientMessage(playerid, COLOR_GREY, "USAGE: /acceptems [playerid]");

                        else if(playerVariables[emsid][pPendingEMS] == 0) return SendClientMessage(playerid, COLOR_GREY, "That player isn't waiting for a medic!");

                        else if(playerVariables[emsid][pPendingEMS] == 1)
                        {
                        GetPlayerName(playerid, medic, sizeof medic);
                        format(msg, sizeof(msg), "Paramedic %s has accepted your EMS call and is en-route to your location!", medic);
                        SendClientMessage(emsid, COLOR_YELLOW, msg);
                        GetPlayerName(emsid, caller, sizeof caller);
                        format(msg, sizeof(msg), "You have accepted %s's call, a checkpoint has been placed on your map!", caller);
                        SendClientMessage(playerid, COLOR_YELLOW, msg);
                        playerVariables[playerid][pEMSAssigned] = 1;
                        GetPlayerPos(emsid, x, y, z);
                        SetPlayerCheckpoint(playerid, x, y, z, 15);
                        playerVariables[playerid][pCheckpoint] = 7;
                        }
                }
        }
        return 1;
}