Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you to remember: Just think of the first part of the English word name. What is it? It's na (な), just like this word!
Please tell me the name of this flower.
Last summer, the movie "Your Name" became popular in Japan.
I still don’t know her name.