Cornell movies dialog dataset (#1319)

* cornell movie dialogs

notebooks/data-augmentation/movie-dialogs/README.md

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+## Dataset Summary
+
+The dataset was created using
+[Cornell Movies Dialog Corpus](https://www.cs.cornell.edu/~cristian/Cornell_Movie-Dialogs_Corpus.html)
+which contains a large metadata-rich collection of fictional conversations
+extracted from raw movie scripts. Dialogs and meta-data from the underlying
+Corpus were used to design a dataset that can be used to InstructGPT based
+models to learn movie scripts.
+
+Example :
+
+```
+User: Assume RICK and ALICE are characters from a fantasy-horror movie, continue the conversation between them
+    RICK: I heard you screaming.  Was it a bad one?
+    ALICE: It was bad.
+    RICK: Doesn't the dream master work for you anymore?
+Assistant: Sure
+    ALICE: I can't find him.
+    RICK: Hey, since when do you play Thomas Edison?  This looks like Sheila's.
+    ALICE: It is...was. It's a zapper, it might help me stay awake.
+    RICK: Yeah, or turn you into toast.
+```
+
+## Usage
+
+```python
+
+from datasets import load_dataset
+dataset = load_dataset("shahules786/OA-cornell-movies-dialog")
+```
+
+## Citations
+
+```
+@InProceedings{Danescu-Niculescu-Mizil+Lee:11a,
+  author={Cristian Danescu-Niculescu-Mizil and Lillian Lee},
+  title={Chameleons in imagined conversations:
+  A new approach to understanding coordination of linguistic style in dialogs.},
+  booktitle={Proceedings of the Workshop on Cognitive Modeling and Computational Linguistics, ACL 2011},
+  year={2011}
+}
+```