I have always wanted to go to New York city. I hear it is the city that never sleeps. Have you ever been?
I have been.  It's an amazing place to visit. It is the largest city, population wise in the country. It is also really diverse.  More than 800 languages are spoken there. 
Wow, I did not even know there were that many languages there. Do you know anything else about New York city?
In the last 10 years the city has the big hub for legal immigration into this country.  
Immigration into this country has become a big concern for a lot of people.
It sure has.  We do need to remember that immigration has always been a big part of how this country grows and changes.  We have more immigrants than any other country,