"I swear, I didn't. If I did I woulda gone to see him already." Which may have been a bad idea anyway, but it's hard to hear your pal is ill and just leave them there in hospital without even trying to visit. At least Klaus has his family around, he supposes, otherwise Cass would have felt even worse about not knowing.

"You... want a drink or anythin'?"

He's not really sure what he can offer by way of apology, but he tries for alcohol.