Question: At the end, are John and Sara married? She's wearing a ring, but he is not. Perhaps they're just engaged?
Question: At the end of the movie when Jonathan is lying in the middle of the rink, you can see the skaters skating around him. However, everyone is wearing roller blades, not ice skates. I was under the impression that this was an ice skating rink, not a roller skating rink. Am I wrong about that, or is this another blooper?
Answer: It is not a movie mistake. The scenes were filmed at the Trump Skating Rink (formerly called the Wollman Rink) in New York City's Central Park. The arena has traditionally been used for multiple venues throughout the year including ice skating, roller skating, concerts, carnivals, etc.
Question: If Jonathan thought Sara was with another man, why did he call off the wedding with Halley?
Answer: He didn't want to marry Halley anyway.
Answer: They are engaged and celebrating the day they met each other.