In this task, you are given dialogue, and you have to find the most critical location in the given conversation.

Hello, I'd like to learn a little about Chicago today! Can you help me?
Chicago is the setting for a few popular hit television series such as Chicago P.D., Chicago Med, NBC's Chicago Fire and Showtime's Shameless
Chicago P.D. is my favorite! Had no idea it was in Chicago. Just kidding! Haha. What can you tell me about Chicago's infrastructure?
No problem! The Chicago Transit Authority covers the transportation in the City of Chicago as well as the surrounding suburban cities outside of Chicago.
Very cool. Must be nice to have public transportation! Any more info?
There are two airports that are owned and operated by the City of Chicago called O'Hare and Midway.
Awesome, thank you! Now... do you have any info about Chicago's history?
Chicago's first railway opened in 1848. They are called Galena and Chicago Union Railroad as well as the Illinois and Michigan canal.
Great. Any other info regarding history or infrastructure?
The state of Illinois has been considering building a new airport in the suburbs of Chicago.
That sounds like a crazy idea! Thanks so much for your help today!
You're welcome.
Chicago