[Yeah, he's starting to see glimpses of the changes. Even if he doesn't know Chekov all that well, some things are impossible to miss.]
None taken. [He gives a wry smile, but his mind is busy processing Chekov's words and what they might mean. Nothing personal to Chekov, apparently, but something he was close to, nonetheless. He tries to keep the tone light because, hey, he's supposed to be making Chekov feel better here, not worse!] Believe it or not, quite a few people travel in time, but unfortunately not all of them have good intentions. That's where Time Agents came in. It was our job to try and stop those people interfering in the timelines.