Update feature_requst.md

Clean up the language in the issue tracker

.github/ISSUE_TEMPLATE/feature_requst.md

@@ -3,14 +3,17 @@ name: Feature Request
 about: If you have any interesting advice, you can tell us.
 ---
 
-## Specific Demand
+## Feature Request
 
 <!--
-What feature do you need, please describe it in detail.
+Describe the issue in detail and why we should add it. To help us out, please poke through our issue tracker and make sure it's not a duplicate issue.
+
+
+Please add the corresponding labels to the issue.
 -->
 
 ## Implement Suggestion
 
 <!--
-If you have any suggestion for complete this feature, you can tell us.
--->
+If you have any suggestions on how to design this feature or any prior art, list them here.
+-->