Problem displaying flight information

Question

This program should display something like Flight NGT 929 has landed. I think there should be a variable holding the letters NGT, but I haven't had any luck so far, here's the code:
function main() {
//take flight number and its status
var flightNumber = readLine();
var flightStatus = readLine();

var flight1 =0;

//assign a flight object to flight1 variable

//output
console.log('The flight ' + flight1.letters + flight1.number + ' is ' + flight1.status)

}

function Flight(flightNumber, status, letters) {
//fix the constructor
number = flightNumber;
status = status;
flight1 = new Flight(letters);

};

// ******** added to help with syntax *****
/*function person (name, age) {
this.name = name;
this.age = age;
}
var John = new person("John", 25);
var James = new person("James", 21);

document.write(John.age);*/

Answer 1

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https://www.sololearn.com/Discuss/2873595/?ref=app