Generally, input nodes are used to request and store user answers. For example if you want to use a player's custom name instead of their first, last, or username, you can use an input node.
Read this thread: http://sequelcreators.userecho.com/topics/143-how-to-ask-about-users-name/
Kik Messenger and Suggested Answers
If you'd prefer to let the user enter their own answer, again use input nodes. Kik has a "Suggested Answers" keyboard that will generally appear after the bot has finished sending messages and a User Choice block is met.
I hope that I was able to help you today.
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