すごく残念ですが、夏に訪問するのは諦めます。姪のパスポートはまだ時間が

すごく残念ですが、夏に訪問するのは諦めます。
姪のパスポートはまだ時間がかかりそうで、飛行機チケットを手配するのに十分な時間がありません。
もしあなたが他のゲストの予定がなくて都合よければまた別の機会にお伺いしたいです。
9月の連休か、年末年始か、ゴールデンウィーク、また検討して連絡します。

結果 (英語) 1:

It's very nice to visit in the summer will give up.So my niece's passport is still time-consuming, to arrange a plane ticket but not enough time.If you plan to other guests, convenient also wants to ask another chance is.September holidays or the end of the year holidays, or Golden, also consider the contact.

結果 (英語) 2:

It is very unfortunate, but it gives up to visit in the summer.
Niece of the passport is still likely to take a long time, there is not enough time to arrange for a plane ticket.
If You want to ask you the convenience you are happy if also another opportunity if there is no plan of the other guests.
Or September of consecutive holidays, or year-end and New Year holidays, Golden Week, also will contact you to consider.

結果 (英語) 3:

Sorry, I will give up to visit in summer.So the niece of passport still takes time, but does not have enough time to arrange a plane ticket.If you are not going to the other guests the opportunity if I want to.In September, the year-end and New Year holidays, golden week, and examined.