M. and Luigi can't pick up the phone? And hey, what if someone entered 4 in our first menu? Or what if they did not understand what to do and kept holding the receiver? We need to build some error handling! Handling Errors Voice XML provides events for many common problems. For example to take some action when the user input did not match any rules in the grammar, we can use the tag. We can use the tag and write a in it, or even the last prompt if there was no input from the user. We can raise our custom events and log errors to the log file too. These events can be handled at the document level, providing a common fallback for any problems??”we will do just that! Now that we have grasped these concepts, let us review our complete index.xml file.