how to show multiple values in point hover using chart.js

var ctx = document.getElementById('chart1').getContext("2d");
    var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fill: false,
            lineTension: 0.1,
            backgroundColor: "rgba(75,192,192,0.4)",
            borderColor: "rgba(75,192,192,1)",
            borderCapStyle: 'butt',
            borderDash: [],
            borderDashOffset: 0.0,
            borderJoinStyle: 'miter',
            pointBorderColor: "rgba(75,192,192,1)",
            pointBackgroundColor: "#fff",
            pointBorderWidth: 1,
            pointHoverRadius: 5,
            pointHoverBackgroundColor: "rgba(75,192,192,1)",
            pointHoverBorderColor: "rgba(220,220,220,1)",
            pointHoverBorderWidth: 2,
            pointRadius: 1,
            pointHitRadius: 10,
            data: [65, 59, 80, 81, 56, 55, 40],
            spanGaps: false,
        }
    ]
};



var options = {
        responsive: true,
        title: {
            display: true,
            position: "top",
            text: 'anything',
            fontSize: 18,
            fontColor: "#111"
        },
        tooltips: {
                enabled: true,
                mode: 'single',
                callbacks: {
                    label: function(tooltipItems, data) { 
                       var multistringText = [tooltipItems.yLabel];
                           multistringText.push('Another Item');
                           multistringText.push(tooltipItems.index+1);
                           multistringText.push('One more Item');
                        return multistringText;
                    }
                }
            },
        legend: {
            display: true,
            position: "bottom",
            labels: {
                fontColor: "#333",
                fontSize: 16
            }
        },
        scales:{
            yAxes:[{
                ticks:{
                    min:0

                }
            }]

        }
    };
var myLineChart = new Chart(ctx, {
    type: 'line',
    data: data,
    options: options
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.js"></script>
<canvas id="chart1"></canvas>