Create table of merged columns

Hi,

I'm working on a graph of bookings by sales person -- I have a table of 2015 data and a table of 2016 data.  

Table 1 - 2015

Sales Person      Amount

John                   $4,000

Steve                  $5,000

John                   $2,300

Alex                    $1,500

Table 2 - 2016

Sales Person      Amount

John                   $4,000

Katie                   $3,900

Steve                  $5,000

Larry                   $2,000

Steve                  $2,300

I need to create a list of the unique sales people in a new table.

Table 3 - New with all sales people from 2015 & 2016

John

Katie

Steve

Larry

Alex

Thanks.