Simplify the following text for a Grade 10 native English-speaking person.
Original: That same year Cadigan joined the convention committee for MidAmeriCon , the 34th World Science Fiction Convention being held in Kansas City , Missouri over Labor Day weekend 1976 ; she served on the committee as the convention 's guest liaison to writer guest of honor Robert A. Heinlein , while also working for fantasy writer Tom Reamy at his Nickelodeon Graphics typesetting and graphic design firm .
Simplified: That same year Cadigan joined the convention committee for MidAmeriCon , the 34th World Science Fiction Convention being held in Kansas City , Missouri over Labor Day weekend 1976 . Her job as a committee member was to help guest of honor Robert A. Heinlein .