lín / shí / yǒu / jí / shì / shí / qǐng / tí / qián / gào / su / duì / fāng / bú / yào / shuǎng / yuē

临时有急事时，请提前告诉对方，不要爽约。

If an urgent matter comes up, please tell the other person in advance instead of missing the appointment.