Have you ever been to New York City? 
I have! I visited Manhattan - the densest borough of NYC. 
I have never been to New York City. I don't think I would like to visit it either.
I don't blame you. With a population of over 8 million people, it is very very crowded wherever you go.
I have heard it is very dirty also. I also know that everything is very expensive.
It is. I would even go so far to say that is dirtier than Dirty Harry from the 1971 action crime film.
That's an interesting way of putting it. I prefer to stay in small towns and enjoy the fresh air. 
Totally. And in small towns at least everyone speaks the same language. It's estimated that over 800 languages are spoken in NYC.