What is the difference between NLP and CI(Conversational...

The difference between NLP and CI(Conversational Interfaces) are as follows -

Natural Language Processing	Conversational Interfaces
NLP is a kind of artificial intelligence technology that allows identifying, understanding and interpreting the request of users in the form of language.	CI is a user interface that mixes voice, chat and another natural language with images, videos or buttons.
NLP aims to make users understand a particular concept.	A conversational Interface provides only what the users need and not more than that.

What is the difference between NLP and CI(Conversational Interfaces)?