Artificial intelligent assistant

desultor

desultor rare.
  (dɪˈsʌltə(r))
  [a. L. dēsultor leaper down, vaulter, agent-noun from dēsilīre, dēsult- to leap down.]
  A circus horse-leaper.

[1727 Bailey vol. II, Desultores, desultorii, Persons of agility of body, who used to leap from one horse to another, at the Horse Races in the Circensian Games.] 1880 M. Collins Th. in Garden I. 183 Clowns and desultors in ragged jackets were hanging about.

Oxford English Dictionary

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