"You and I need to have a very important conversation," she says to him.
If you were in your own office having an important conversation, you wouldn't take calls.
I have just been cut off in the middle of a most important conversation.
The two sat down and began a low, important conversation.
There can't be that much important conversation in a lifetime.
This was important, maybe the most important conversation they'd had.
"Maybe this show can start some important conversations," he suggests.
It struck me as the perfect place and time for an important conversation.
However, he was the subject of important conversations at the hotel.
Your mother and I are in the middle of a very important conversation.