Report Writer

I have this report and the data that feeds it comes from this query at the bottom of the page.

I want a report to prompt the user at run time with a date picker that will

select the records based on how this field "CONVERT(VARCHAR(64),rp.ProcessStarted,101)" 

matches the date selected in the date picker.  Currently my query is hardcoded with a date.

SELECT  rp.ReportProcessID AS [Ticket Number],
        u.LastName + ', ' + u.FirstName AS [Contact],
        rp.ProcessTitle AS [Description],
        ISNULL(u3.FirstName + ' ' + u3.LastName,'[none]') AS Submitter,
        ISNULL(u2.FirstName + ' ' + u2.LastName,'[none]') AS Resolver,
        CONVERT(VARCHAR(64),rp.ProcessStarted,100) AS Started,
        [dbo].GetTaskAssignments(t.TaskID) AS Assignments,
        rp.Result AS Status,
        im.Priority,
        ISNULL(im.merged_classification_text,'-') AS Category

FROM  (ReportProcess rp JOIN ServiceDeskIncidentManagement im ON rp.SessionID = im.session_id)
    -- LEFT JOIN ReportProcessComment rpc ON rp.SessionID = rpc.SessionID
       LEFT JOIN [User] u2 ON u2.UserID = im.resolved_by_user_id
       LEFT JOIN [User] u3 ON u3.PrimaryEmail = im.submitted_by
       JOIN Task t ON rp.SessionID = t.TrackingID AND t.IsCompleted = 'False'
       LEFT JOIN
      (ReportProcessContact rpct JOIN [User] u ON rpct.ReferenceID = u.UserID)
       ON rp.SessionID = rpct.SessionID

WHERE CONVERT(VARCHAR(64),rp.ProcessStarted,101) = '11/17/2013'
  AND rpct.IsPrimary = 'True'

ORDER BY rp.ReportProcessID