Which preposition to use with conversationalist

in Occurrences 3%

One day several years ago, when Mr. Lowes Dickinson's statement that he had found no conversation andworse stillno conversationalists in America was fresh in our outraged minds, I happened to meet an English woman who had spent approximately the same amount of time in our country as had Mr. Lowes Dickinson.

for Occurrences 1%

A young man talking of his love does not need a brilliant conversationalist for companion.

Which preposition to use with  conversationalist