In case you don’t have a way to reset your WordPress password from the UI with lost password you will need to go directly into the database and do this.
With WordPress it is easy to change the admin password and take the control back to your admin area. You just need to go into the database on the wp_users table and change the user_pass field in MD5 with your new password.
The database can be accessed with the help of phpMyAdmin and the table be edited very easily, in case you don’t know your database credentials (username and password) you can get them from the wp-config.php file from the main website install directory.