diff --git a/convlab/policy/emoUS/sentiment.json b/convlab/policy/emoUS/sentiment.json
new file mode 100644
index 0000000000000000000000000000000000000000..7d39df53b29133f0ef817326c37df481f3c936ed
--- /dev/null
+++ b/convlab/policy/emoUS/sentiment.json
@@ -0,0 +1,5 @@
+{
+    "Neutral": 0,
+    "Negative": 1,
+    "Positive": 2
+}
\ No newline at end of file