diff --git a/src/main/java/seedu/address/logic/Messages.java b/src/main/java/seedu/address/logic/Messages.java
index 2f0553c378d..39c40558b35 100644
--- a/src/main/java/seedu/address/logic/Messages.java
+++ b/src/main/java/seedu/address/logic/Messages.java
@@ -12,7 +12,7 @@
  */
 public class Messages {
 
-    public static final String MESSAGE_UNKNOWN_COMMAND = "Unknown command";
+    public static final String MESSAGE_UNKNOWN_COMMAND = "Unknown command.";
     public static final String MESSAGE_INVALID_COMMAND_FORMAT = "Invalid command format! \n%1$s";
     public static final String MESSAGE_INVALID_PERSON_DISPLAYED_INDEX = "Error: Invalid index. "
             + "Please enter an index within range.";
diff --git a/src/main/java/seedu/address/logic/commands/CommentCommand.java b/src/main/java/seedu/address/logic/commands/CommentCommand.java
index 2a5cc1404a8..8fc45be8d25 100644
--- a/src/main/java/seedu/address/logic/commands/CommentCommand.java
+++ b/src/main/java/seedu/address/logic/commands/CommentCommand.java
@@ -29,7 +29,7 @@ public class CommentCommand extends Command {
             + "Example: " + COMMAND_WORD + " 1 "
             + PREFIX_COMMENT + "Hardworking student";
 
-    public static final String MESSAGE_ADD_COMMENT_SUCCESS = "Added comment to Person: %1$s";
+    public static final String MESSAGE_ADD_COMMENT_SUCCESS = "Applicant has been successfully commented on.";
     public static final String MESSAGE_DELETE_COMMENT_SUCCESS = "Removed comment from Person: %1$s.";
 
     private final Index index;