Dear MC,
This is such a little thing, but you writing back to my e-mail, just to wish me a good holiday weekend, too, was really nice. (and also something I'm pretty sure T would never do, based on some past e-mails/texts I've sent.) I mean, it probably took you less than a minute, but you still took that time. Stuff like that is further proof that you really do care about me as a person, not just a client.
(Not that T doesn't care, of course, but, you know...you're just different.)
Love,
LT