I'm awfully sorry to disturb you, but because of the change of my leader's schedule, I have to cancel the two rooms booked before.

很抱歉打扰您，由于领导行程变化，需要取消我之前预定的两间房间。

youdao

Do Not Disturb can be set to work on a daily schedule, like from 11 p.m. to 7 a.m.

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Take some steps to prevent a repeat performance: Install a lock on your bedroom door, encourage kids to knock, play soft music or the TV for white noise at night, and schedule "private parent time" when your child knows not to disturb you.

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