RE: User's input

You can use patterns and templates from the "Training & Chat Logs" page.
This lets you do a basic level of programmatic processing.
You can also do more advanced things from the "Scripts" page by writing your own script.

To reuse part of a pattern in a response use the "star" variable. If you have multiple * in the pattern star becomes an array, so use star[0], etc.

You need to prefix patterns with Pattern("") and templates with Template("").
To use a variable or code in a template use {}.

Examples:

Pattern("Do you like *?")
Template("Yes I like {star} very much.")

Pattern("Do you like * or *?")
Template("I like {star[0]} but I don't like {star[1]}.")

What is the date today?
Template("It is {Date.date()}.")

For inputting a number you probably want to use a script, but may be able to use a response with a default response with a previous as well.

Scripts are more complex, they are written is Self, which uses states and patterns. Self follows the JavaScript syntax.