LitCharts assigns a color and icon to each theme in The Sun is Also a Star, which you can use to track the themes throughout the work.
Immigration and the American Dream
Passion vs. Reason
Interconnectedness and Destiny
Isolation vs. Connection
Summary
Analysis
Daniel studies the directory in Natasha's building, but he can't figure out who she could possibly be seeing. He decides to check where his interview is, since it's in just over an hour, and discovers that his interview is actually in this building.
The coincidence that Daniel is seeing someone in the same building shows again that he and Natasha are connected in many mysterious ways, which per the novel's logic, is the work of destiny.