Realizing natural human-machine communication is the main objective of artificial intelligence (AI), a popular technology. To increase human-machine interaction, many IT-based businesses have also made use of conversation network technology to develop different kinds of Virtual Personal Assistants. Examples of these include Alexa, Cortana, Google Assistant, Siri, and many others. We createda virtual assistant that works similarly to Microsoft's "Cortana" voice assistant. It uses Python to carry out simple operations on the Windows platform, following instructions. Python is utilized in this case as a scripting language because of its extensive library, which is used to carry out commands. A customized virtual assistant identifies and interprets the user's voice using Python libraries. Voice assistants are an amazing development in the field of artificial intelligence that has the potential to change people's lives in many different ways. When the voice- based assistant first appeared on cellphones, it became widely used. It was universally acknowledged. Voice assistants were formerly mostly found in computers and smartphones, but they are currently becoming more and more common in smart speakers and different home automation systems. Numerous technologies appear to be becoming smarter in their unique ways, enabling them to have basic linguistic conversations with people. Desktop voice assistants are computer programs that recognize speech patterns and respond via an integrated speech system. This essay will describe the various types of voice assistants and discuss the main drawbacks and difficulties they have. This study discusses how to construct a voice-based assistant without using cloud services, which would encourage the development of such gadgets in the future.