Weird little glitch driving me nutts! - (undefined)

var students = [
  {
    name: 'James',
    track: 'Js Basics',
    achievement: '10',
    points: '100'
  },
  {
    name: 'John',
    track: 'CSS Basics',
    achievement: '25',
    points: '300'
  },
  {
    name: 'Rachel',
    track: 'HTML Basics',
    achievement: '30',
    points: '100'
  },
  {
    name: 'Richy',
    track: 'Java Basics',
    achievement: '50',
    points: '350'
  },
   {
    name: 'Jocky',
    track: 'MEAN Stack',
    achievement: '300',
    points: '1000'
  }
]

var studentRecords = '';
var custInquire;
var student;
var holdReport;
var flag =  true;



//CODE -  function to get an individual student's record using for-in loop:

function getStudentReport (students) {
  for (var property in students) {
    holdReport += '<p>' +property+ ': ' +students[property]+ '</p>'
  }
  return holdReport
}


//CODE -function  to print out to the document 

function print (message) {
  var outputDiv = document.getElementById('output');
  outputDiv.innerHTML = '<div>' +message+ '</div>'
}

// CODE -  check visitor input against set of parameters for an output.

while (flag) {
  custInquire  = prompt ('what student records would you like?, type quit to leave program or list for full list');
  if ( custInquire.toLowerCase() === 'quit' || custInquire === null){ 
    break;
  }else if  ( custInquire.toLowerCase() === 'list'){
   print (academyRecord());
    break;
  }else {
    for (var i = 0; i < students.length ; i++) {
    student = students[i].name;
    if (custInquire.toLowerCase() === student.toLowerCase() ){
     print (getStudentReport (students[i]));
     flag = false;
      }
    }
  }
}

//CODE -  function to list all of student records

function academyRecord (){
  studentRecords += '<h1>Below you will find our student records</h1>';
  for (var i = 0; i <students.length ; i++) {
    studentRecords += '<h2><strong> Below are the records for ' +students[i].name+ ':</strong></h2><hr>';
    for (var prop in students[i]){
      studentRecords += '<p>' +prop+ ': ' +students[i][prop]+ '</p>';
    }
  }
  return studentRecords;
}