[It isn't that Alucard is in favor of trading blows, but he comes to expect it. So the more reasonable approach of discussion might actually not be... so bad. He looks a bit confused at first before he glances away, scowling.]

Unless you know every person that has ever perished, I do not think you could help. Even if you are his son.

...But there are two people I am seeking. Though I am alive, they are very much not.