Updated User Guide

Updated User Guide with help command guide.
Also added more personality to Duke.

docs/README.md

@@ -112,6 +112,14 @@ Here are the tasks in your list:
 2. [D][✓] example 2 (by: 15 September 2018, 12:39PM)
 ```
 
+### `help` - Displays a help message
+
+Ask Duke for the list of commands you can use if you are forgetful or new to the system.
+
+Example of usage:
+
+`help`
+
 ### `exit` - Closes the chat bot
 
 Say goodbye to Duke as it goes to sleep. The application window does not

src/main/data/help.txt

@@ -1,4 +1,4 @@
-Here are the list of commands that you can use:
+Woooof! Here are the list of commands that you can use:
   - todo <task name>
       (saves a default To-Do task)
   - deadline <task name> /by <date and time in D/MM/YYYY HHmm>

src/main/java/Ui.java

@@ -32,8 +32,8 @@ public String showWelcome() {
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
          */
-        final String startMessage = "Hello! I'm Duke, Your Task Assistant Dog.\n"
-                + "What can I do for you?\n" + "If you need help, type help in the field.";
+        final String startMessage = "Bark Bark! I'm Duke, Your Task Assistant Dog.\n"
+                + "What can I do for you?\n" + "If you need help, type 'help' in the field.";
         return startMessage;
     }