yǐjīng yuē hǎo de shìqing bù huì qǔxiāo, rú yǒu biànhuà wǒ huì tíqián tōngzhī

已经约好的事情不会取消，如有变化我会提前通知。

Arrangements that have been made won't be canceled; if there are any changes, I will notify you in advance.