This is a quick and easy mission to take care of when you first enter Diamond City during the Jewel of the Commonwealth quest. As you enter the city, enter Publick Occurrence on your immediate left and speak to Piper.
Agree to an interview. Answer her questions however you like.
Return to Diamond City after at least a day. Talk to Nat at Publick Occurrences for the latest edition of the paper to see how your interview turned out.