- Avoid "Actually" when answering questions. It sounds defensive. Sometimes it even sounds dishonest. If you need a word there, use "Yes."
- I think the British would usually say: "I'm going to the cinema with Dorothy." In the U.S, we would say: "I'm going to the movies with Dorothy.") However, there's nothing wrong with the way you phrased it.
[I edit copy and have tutored college writing.]