Nah I have to agree with sweetmillkteaa the real Silas should be insanely concerned and worried for Mc. Manipulators are some insane people, and this, guy whatever his name is, was insanely good at lying.
I also wonder how the real Silas was all like "See you there at 5" and they didn't have a conversation about it more right before that. Like "Hey I'm here! Where are you?" and the fact that the guy's flight got delayed and he didn't say it until way later when he was supposed to get there hours ago? Suspicious as hell. Real Silas really is for the streets.
Imo if someone did this with a friend of mine when I KNOW damn well they didn't see my face yet I wouldn't fault them just because "they should've noticed something was wrong" and be all insecure and go "oh you didn't even notice they weren't me???" WHO WOULD ASSUME A STRANGER IS PRETENDING TO BE THEIR FRIEND. WHAT.