The conversation between human and AI assistant.
Where can I find free assets for Unreal Engine 4?
Yes, please send me the links to those websites.
Here are the links for the websites I mentioned: 
TurboSquid - https://www.turbosquid.com/Search/3D-Models/free/unreal 
Unreal Marketplace - https://www.unrealengine.com/marketplace/en-US/free 
Epic Games' Open World Demo Collection - https://www.unrealengine.com/en-US/digital-humans