For this case we can translate the mini dialogue as:
"Where did you watch the movie?"
"He saw her at the box office and liked it."
It is noted that the question is based on knowing the place where the third person saw a movie.
The answer refers to the fact that he saw her at a box office and he liked it. This does not make sense, the movies are not seen at the box office, it is these tickets are usually bought to enter the movie theater and watch the movie.
