Crossed Wires (1923)

Marcel Murphy a telephone operator with society aspirations overhears Mrs Bensons conversation describing a party she is planning for her son Ralph and wangles an invitation by imitating Mrs Bensons voice At the party a maid accuses Marcel of the theft of another guests jewelry but she appeals to Mr Benson who covers up for her by describing Marcel as the daughter of an old friend and by secretly installing her in a hotel suite