Redirect to checkout page

<script>
jQuery(document).on('em_booking_complete', function(event, response){
	// called by EM if return JSON contains gateway key, notifications messages are shown by now.
	jQuery('.em-wc-booking-message').remove();
	var message = jQuery('.em-booking-message').removeClass('em-booking-message').addClass('em-wc-booking-message').attr('role', 'alert');
	if( response.result && typeof response.redirect == 'undefined' ){
		setTimeout(function() {
		  window.location.href = "/checkout/";
		}, 3000);
	}else if( !response.result ){
		message.addClass('woocommerce-error');
		jQuery('.em-booking-message-error').removeClass('em-booking-message-error');
	}
});
<script>