Artificial intelligent assistant

melancholiac

melancholiac, a. and n.
  (mɛlənˈkəʊlɪæk)
  [f. melancholia + -ac, after maniac.]
  a. adj. Affected with melancholia. b. n. One suffering from melancholia.

1863 Reade Hard Cash III. 100 In short, she gave them the impression that Alfred was a moping melancholiac. Ibid. 123 A lunatic of the unhappiest class, the melancholiac. 1897 A. R. Urquhart in Dict. Nat. Biog. LII. 320/2 Separating the insane into groups of maniacs, melancholiacs, and so on.

Oxford English Dictionary

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