A computer-implemented method includes: monitoring, by a user device, calling activity on the user device; detecting, by the user device and based on the monitoring, that a call has started on the user device; providing, by the user device, a pause instruction to an assistant device based on detecting that the call has started on the user device, causing the assistant device to disable speech response functions; detecting, by the user device and based on the monitoring, that the call has ended on the user device; and providing, by the user device, a resume instruction to the assistant device based on detecting that the call has ended on the user device, causing the assistant device to resume speech response functions.