State of emotion time series

A computer implemented method, comprising:

• obtaining, by one or more processor, inputs of emotion time series data of a user and environmental factor data from one or more data collection device for a user assistance service;
• generating, by the one or more processor, a baseline emotion time series based on the inputs from the obtaining;
• ascertaining, by the one or more processor, one or more environmental factor affecting states of emotion as represented in the emotion time series by regression analysis;
• building, by the one or more processor, an emotion time series model for one of the one or more environmental factor from the ascertaining;
• predicting, by the one or more processor, one or more path to a target state of emotion at a target time in the future on the emotion time series model;
• and
• producing, by the one or more processor, a recommendation specifying one or more activity to perform for the user in order to attain the target state of emotion at the target time.