I was flying home for xmas this year and my g/f happened to be flying out the same day. After getting a hold of her schedule i booked a mulit-city trip to be on the same plane as her.
A few days earlier i had put in my upgrade request and it cleared while my g/f was still seated in the back. While boarding i rushed ahead and told the flight attendent that i wanted to give my "friend" my J seat and i would take her's in the back. My g/f was a little flustered when they FA directed her to sit in 1F. I settled into my seat back in 27c. Once the doors were closed the FA came back and said to me we have a seat for you up front. 1d was unoccupied and they sat me next to my g/f for the flight.