Report showing two dates on line graph?

I created a dataset from a Salesforce Object where I want to show the number of Coaching session created in one day vs how many are completed in one day. 

I can get these to show in line graphs when I create individually, but I want to show this on one graph. When I try to group by two date, it makes the lines for the date itself. How can this be shown with a line for create date count and completion date count with date as the x-axis and count on the y-axis?