14. The server device of claim 9 , where the processor is further to: determine that the answering party is the user when total user factor is greater than the total device factor, and output an interactive message when the answering party is determined to be the user.
9. A server device, comprising: a memory to store a word repository including a plurality of key words; and a processor to: transmit a call, receive a ring tone signal based on the call, receive an indication that the call was answered, the indication including initial speech from an answering party, and the answering party including a user or a user device, perform a ring tone operation to determine a user ring tone factor and a device ring tone factor based on a duration of the ring tone signal, perform an initial speech operation to determine a user speech factor and a device speech factor based on a duration of the initial speech, determine whether one or more words, contained in the initial speech, are included among the plurality of key words in the word repository, perform a confidence operation to determine a user confidence factor and a device confidence factor based on whether the one or more words are included among the plurality of key words in the word repository, determine a total user factor by combining the user ring tone factor, the user speech factor, and the user confidence factor, determine a total device factor by combining the device ring tone factor, the device speech factor, and the device confidence factor, determine that the answering party is the user device when the total user factor is less than the total device factor, and output, to the user device, a non-interactive message when the answering party is determined to be the user device.