Your blockchain wallet password is never shared or stored in the wallet servers, so if you lose your password once, there’s no one else but you who can reset it. To reset your blockchain wallet password you need your backup phrase. In case you didn’t save the backup phrase before, then you must know that your cryptocurrencies are gone now. There is no way to reset the Blockchain wallet without a backup phrase. So until and unless you remember the password of your wallet or have a backup or recovery phrase, you are stuck in a terrible situation.