Whose x Which: para dizer "cujo(s)", "cuja(s)"

Hello friends,

Can you help me?

I wrote a composition about stressfull experiences I had while travelling abroad and the following sentence is an extract from the text:

About 15 minutes later, it was announced that our next stop would be a city, whose name I can't remember, but that wasn't in our route back to Chur.

My teacher crossed the word "whose" out, and suggested that I write "which" instead. I asked her why and she said that the way she suggested is the way people say it and that it's much better to avoid using whose for things. Ok, I agree with the avoiding part, but it wouldn't be wrong If I insisted on writing it; it's still standard English, isn't it?

So, the phrase the way she suggested would be:

"About 15 minutes later, it was announced that our next stop would be a city, which name I can't remember, but that wasn't in our route back to Chur."

It sounds strange, doesn't it?

Should't it be: "About 15 minutes later, it was announced that our next stop would be a city, which I can't remember the name, but that wasn't in our route back to Chur"?

What do you think?