The dialogues are based on the following code:

https://gist.github.com/kived/742397a80d61e6be225a

It ships with license, provided below:

>>> The following license shall apply to all Public Gists owned by account. It
>>> shall never apply to any Secret Gists, for which no license of any sort is
>>> granted.
>>> 
>>> Copyright (c) 2015- Ryan Pessa
>>> 
>>> Permission is hereby granted, free of charge, to any person obtaining a copy
>>> of this software and associated documentation files (the "Software"), to deal
>>> in the Software without restriction, including without limitation the rights
>>> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
>>> copies of the Software, and to permit persons to whom the Software is
>>> furnished to do so, subject to the following conditions:
>>> 
>>> The above copyright notice and this permission notice shall be included in
>>> all copies or substantial portions of the Software.
>>> 
>>> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
>>> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
>>> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
>>> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
>>> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
>>> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
>>> THE SOFTWARE.

Code modification are subject to the license of the tagit software.