Artificial intelligent assistant

cheeriness

cheeriness
  (ˈtʃɪərɪnɪs)
  [f. cheery a. + -ness.]
  Cheery quality or condition, lively gladsomeness.

1864 in Webster. 1876 M. E. Braddon J. Haggard's Dau. II. 96 ‘What have you two girls been talking about?’..asked Joshua, with an attempt at cheeriness. 1877 Morley Crit. Misc. III. 98 The cordial cheeriness of Scott's letters. 1879 D. J. Hill Bryant 203 He fills the mind with the breezy cheeriness of spring-time.

Oxford English Dictionary

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