マークからメール来たよ。
28日の水曜(すみません水曜じゃないと時間が取れない…)宴会参加できる人早めに連絡くださいな。
人数が集まれば宴会しようと思います。
人数が集まらなければ残念だけどお流れで。
マークに連絡入れるんで早めに連絡よろしくね。

Takkun, genki? It's Mark.
Hey, some of my friends are going to visit Tokyo from 3/25 to 3/30, do you have any parties or something going on that they can go with you? They have not been to Japan before so they don't know about good places to go. If you have something to do let me know, thanks!

Mark