娘が体調を崩して留学先から一時帰国していましたが、回復していることをホームステイ先に報告したい。またご家族と出かける予定だったナイアガラの旅行に行けなくなったことをお詫びしたい。

Dear XXX,
Thank you for the mail.

Makiko is getting better now, even though she looked pale and had stomach pains when she returned home. I am glad to tell you that there was nothing wrong with her health check-up. I am very relieved. Thank you very much for taking care of her in Tronto.

I am sorry that she can't join you for the trip to Niagara Falls. I hope you will still be able to enjoy it with your family. Makiko is missing all of you!

She will be back over there, maybe at the end of May. We will be sure to let you know as soon as she is all better.

Let me keep in touch,
[your name]