Communication/Activity Reports can help you keep track of ongoing communication with new and existing clients.  All communication reports can be found under your Sales and CRM Dashboard.

New Lead Communication by Owner

This report will provide you with a list of Communication activities based on when the Contact was created, and the Activity due date range.
Choose to include additional information in the report by selecting from the Optional Columns

Recent Communication by Contact

This report will provide you with a list of Communication activities based on the Author, Assigned user and Activity date range.
Choose to include additional information in the report by selecting from the Optional Columns