Giles and Buffybot in “Bargaining, Part One”

[sadly] I just can't help but wonder if... she would have been better off without me. Buffy.

I don't think that's true. You were very helpful to her.

[laughs bitterly] Right. Yes, I was a perfect Watcher. I did what any good Watcher would do - got my Slayer killed in the line of duty.

Oh, that wasn't your fault.

Of course not. That's how all Slayer-Watcher relationships end, isn't it? She's gone. I did my job.

[innocently] Then why are you still here?