How do I assign class code for my LAS file?

[ChungBuiMinh]

I have LAS files with code 0 - never classified. I have no other classes other than this. 

I want to classify my LAS file into different types of code such as LAS format file version 1.4 to extract the building footprint and build the building from the lidar file. 

What can I do? Any suggestions for me

Thank you so much

[DanPatterson]

Change LAS Class Codes (3D Analyst)—ArcGIS Pro | Documentation

and subsections in the help topic might be what you are looking for

[PhucTran1]

Thank you for your suggestion. But I want to assign point cloud automatically. And I am still stuck with this problem. I can Selection, and change it manually in the Interactive editing tab. 

Do you have any experience using Deep learning for Classification Point Cloud?

Thank you for your reply!