返信 へんしん よう葉書 はがきではありませんでした
henshin'yō hagakidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 返信用葉書

1. It was not a reply postcard.; It wasn't a return postcard.

Past/Perfective
Negative
Polite
Formal Register