voicemail.js

exports.handler = function(context, event, callback) {
    const twiml = new Twilio.twiml.VoiceResponse();
    if (event.DialCallStatus === 'completed' || event.DialCallStatus === 'answered') {
        twiml.hangup();
    } else {
        twiml.redirect({
            method: 'POST'
        }, "https://twimlets.com/voicemail?Email=user%40example.com&Message=Please%20leave%20a%20message%20at%20the%20beep&Transcribe=false");
    }
    callback(null, twiml);
};