Reset password automatically

Summary

Instead of reset a contact's password manually, I'm looking for a way that the OSvC could acomplish the same task by itself. (Without human intervention)

Content

Hello!

As I explain in summary, I'm working with the Reset contact's password in Customer Portal.
The steps are:

1° User wants to login in Customer Portal and don't remember his/her password.
2° User clicks in the option "Forgot your username or password?"
3° User is redirected to the account_assistance web page.
4° User inputs his/her username, wich is validated with the OSvC User's Database, and make a click on the Reset password button.