How to change Add to cart button text in WooCommerce

add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_custom_single_cart_button_text' ); // For single product
function woo_custom_single_cart_button_text() {
return __( 'Book Now', 'woocommerce' );
}

add_filter( 'woocommerce_product_add_to_cart_text', 'woo_custom_cart_button_text' ); // For Catalog and index pages
function woo_custom_cart_button_text() {
return __( 'Book Now', 'woocommerce' );
}