window.addEventListener("message", receiveMessage);
function receiveMessage(e) {
if (typeof e.data !== 'string') return;
if (e.data.search('mytime-bookings-page:confirmed') > -1) {
var dataLayer = window.dataLayer || (window.dataLayer = []);
dataLayer.push({
'event': 'mytimeBookingCompleted'
});
}
}