Technically, you just used it in a sentence right there! :)
But I assume you wanted more examples:
I had a conversation with a friend
They are having a conversation
We had a wonderful conversation
The conversation was long
The conversation was boring
The conversation between Ana and Paul was highly flirtatious.
Only use the word you when you are having a conversation with someone you are talking about!
Please help me steer the conversation away from this delicate subject.
some say that conversation is the best aphrodisiac
I'm sorry I imposed on your private conversation.
My friend was feeling down, so I had a conversation with my friend and after the conversation my friend felt much better!
You can just about use any word possible to start a sentence
you sayhello how are you freind not in letter form but insentence form
in a conversation people might say factious things
Insight therapy relies on conversation.
The digression in the conversation wasn't subtle.To digress means to stray away or deviate from a topic in a conversation or argument.
Example sentence - We occasionally see each other at charity functions and exchange light conversation.
We can bring these issues up during an informal conversation with our staff