Output Set for Next Performances - Help please!

Hi All !  Looking for a little help!

I am trying to create a custom output set for my box office team, so they can pull our 5 show subscribers performance dates in one string to be used in a mail merge letter for subscribers. 
They are getting a letter/email saying:  "here are your 5 upcoming show dates"

I found a Next Performance Output set in the Output set cookbook (see attached) , but am not sure what Data_From i should be using and am getting errors. 

Long and short - can anyone give me some time on a go to meeting to help? or can anyone comment here to help!  

OR is there another way to get that info that we don't know about? 

 

Thank  you!