如何才能礼貌地打断别人的对话

I'm sorry to interrupt but you're needed (on the phone / in the office / in the classroom / etc.)

很抱歉打扰你，但是有人找你（打电话/在办公室/在教室/等等）。

Sorry for the interruption. It's Jim / Peter / Mary on the phone.

对不起，打扰了。吉姆/彼得/玛丽来电话了。

Pardon me, but I have John on the phone.

对不起，正在和约翰通话。

Excuse me, could I get a signature / an answer / a cup of coffee quickly?

对不起，我能尽快拿到签名/得到答案/喝杯咖啡吗？

I'm sorry to interrupt, but this will only take a minute.

很抱歉打断你，但这只需要一分钟。

Sorry for the interruption, but could you (answer a quick question / help me for a moment / give me an opinion on ...)?

对不起打扰了，你能（回答一个简短的问题/帮我一会儿/给我一个关于……的意见）吗？

I'm so sorry. This will just take a minute.

我很抱歉。这只需要一分钟。

I apologize for the interruption, but I have an important question.

抱歉打断你的对话，但我有一个重要的问题。