David is out for lunch.
David出去吃午飯了。

be/go out for...
出去做...
Susan is out for shopping.
蘇珊出門購物了。
Let's go out for a drink.
我們出去喝一杯吧。

A:Hello. Can I talk to David?
你好。能讓David接電話嗎？
B:One second, please. ( a few seconds later, the receiver comes back and says) Hello?
請稍等。（片刻后，接電話者返回并說）喂？
A:Yes.
請講。
B:I'm sorry. David is out for lunch right now.
很抱歉，David出去吃午飯了。
A:Okay. I'm his wife. Could you tell him to call me back when he returns?
好的。我是他妻子。等他回來了能讓他給我回個電話嗎？
B:Sure.
當然。
A:Thanks. Please tell him to call my cell-phone number.
謝謝。請讓他打給我的手機。
B:Ok, I will.
好的，我會的。
A:Thank you very much.
非常感謝。
B:No problem.
被客氣。