1、我打算为他办一场欢送会——I'm going to hold a farewell party for him。

2、欢送会[huān sònɡ huì]：farewell meeting；send-off meeting；send-off。

3、如果你星期六能来参加的欢送会，我们将深感荣幸——We should be delighted if you are able to come to our farewell party this Saturday。