/*jshint multistr:true */

var text = "Hey, how are you \
doing? My name is Dmitry.";
var myName = "Dmitry";
var hits = [];

for (i = 0; i < text.length; i++){
   if (text[i] === 'D'){
		for(var j = i; j < (myName.length + i); j++) {
			hits.push(text[j]);
		}
   }
}

if (hits.length === 0) {
	console.log("Your name wasn't found!");
} else {
	console.log(hits);
}