According to imdb.com, 'Can't blame a girl for trying' was Vala in 'The ties that bind'. (I know--that's cheating, but I really had no idea where it came from and wanted to answer the one listed below...).
The 'yeah, my career's over' was Sam Carter in 'Hathor' (after she clocked Hammond with the butt of her rifle).
New quote:
'Well, maybe you could try coming up with something other than inappropriate sarcasm!'
"You want sarcasm? Nice to meet you.'
'Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming -- WOW -- what a ride!