I'm looking for the title and author of a short story.
Set in the future, the main character (a man) lives in a huge city where nothing "real" grow or lives. The other people he meets are androids. His search takes him to the highest and lowest points in the city (via elevator).
Eventually he finds a park full of flowers, trees and grass etc. He's ecstatic, but when he picks a flower he discovers everything is fake. Distraught he tries to commit suicide only to discover that he too is an android.