Zoë mentions that she is standoffish and hard to talk to, and when she does mention Sofia to Reza he appears surprised that they are friendly yet Zoë tells him they aren't. When Zoë asks about Reza and Sofia's relationship Reza says "Friendly? I guess. We only talk about work, But so do Sully and I, and we're best friends."
Reza later remembers that Sofia is out on an interview, and that she won't be back at work today.