If you have forgotten your Phantom password, you can reset it by re-importing your Secret Recovery Phrase and starting over. Your wallets will be restored to normal once you successfully import your recovery phrase.
Click the "Forgot Password" link that appears below the password field and click "Reset Secret Phrase".
If you have forgotten your password and lost your Secret Recovery Phrase, there is nothing the Phantom team can do to help you access your wallet. Your funds will be lost forever.