我们发送诚挚的问候和祝福。

Wǒmen fāsòng chéngzhì de wènhòu hé zhùfú.

We send sincere greetings and blessings.

请接受我最诚挚的歉意和道歉。

Qǐng jiēshòu wǒ zuì chéngzhì de qiànyì hé dàoqiàn.

Please accept my sincerest apologies and regrets.