Ms. Chen cannot attend the board meeting because of a prior engagement in Taipei.

陳小姐因為在台北已有約在先，無法出席董事會議。

I'm afraid I have a lunch engagement with a client, so let's reschedule our call.

不好意思，我和客戶有午餐之約，我們的通話改期吧。

The keynote speaker canceled all speaking engagements after his flight to Singapore was delayed.

主講人飛往新加坡的班機延誤後，取消了所有演講行程。