Artificial intelligent assistant

antiphonically

antiˈphonically, adv.
  [f. prec. + -ly2.]
  In an antiphonic or antiphonal manner; antiphonally.

1846 W. Maskell Mon. Rit. I. Introd. 34 Portions of the services..sung..antiphonically. 1851 Q. Rev. No. 177. 237 The singers, for their own ease, sang them antiphonically.

Oxford English Dictionary

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