I live in a big city called New York City. It is the most populous city in the USA. 
Really? How many people live in New York City?
In 2016, 8.5 million people lived there. 
Wow my goodness.. when was new york city founded?
New York City was consolidated in 1898 into a single city. 
Ohhh okay. Who is a famous person born in NYC?
physically connected to the Bronx and separated from the rest of Manhattan by the Harlem River. Manhattan Island is divided into three informally bounded components, each aligned with the borough's long axis: Lower, Midtown, and Upper Manhattan.
Manhattan has been described as the cultural, financial, media, and entertainment capital of the world, and the borough hosts the United Nations Headquarters. Anchored by Wall Street in the Financial District of Lower Manhattan, New York City has been called both the most economically powerful city and the leading
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Two-thirds of New York State's population resides in New York City Metropolitan Area. New York City is the most populous city in the United States, with an estimated record high population of 8,550,405 in 2015, incorporating more immigration into the city than emigration since the 2010 United States Census. At least twice as many people live in New York City as in the second-most populous U.S. city (Los Angeles), and within a smaller area. Long Island alone accounted for a Census-estimated 7,838,722 residents