Make a note of it

There is a term called "noteworthy" that seems to be appropriate for the purposes of a sales interaction.

By writing down some of the main points of the conversation, you will not only show the prospect/customer that you are listening and that you care, you will also show that what they are saying is worthy of making note of it.

Also, if you write down what they say word for word and how they say it (use quotes on these parts), then you will have a tool to use later in the sales process to assist in closing the sale.