I'm required to create a Amazon Skill Kit to open a ticket in our ticketing tool. By looking at the examples for Amazon Skill Kit, I couldn't find a way of accepting the free form text as input. Other option is by creating a custom slot with all probable set of inputs as custom slot inputs.
But in my case, all i have to do is capture the full content of user input to log it somewhere in the ticket which is very unlikely to expect the probable utterances before hand.
Correction to my comment... I, and others, may be misunderstanding the deprecation of the AMAZON.LITERAL. I found that custom slots still pass through literal content that did not match the predefined entries. If you have a custom slot with the entries "Bob" and "John" and I say "Samuel" my skill is still sent "Samuel". Which seems identical to previous AMAZON.LITERAL behavior. (AMAZON.LITERAL required you to provide example utterances, just as custom slots require to provide example utterances, so it seems only a difference in definition, not function.)
As you think about what users are likely to ask, consider using a built-in or custom slot type to capture user input that is more predictable, and the AMAZON.SearchQuery slot type to capture less-predictable input that makes up the search query.
You can read more here
To get the value in your application you will have to this
event.request.intent.slots.IntentName.value
Update: This is no longer possible as of October 2018.
AMAZON.LITERAL is deprecated as of October 22, 2018. Older skills built with AMAZON.LITERAL do continue to work, but you must migrate away from AMAZON.LITERAL when you update those older skills, and for all new skills.
You can use the AMAZON.LITERAL slot type to capture freeform text. Amazon recommends providing sample phrases, but according to this thread, you may be able to get away with not providing them.
来源：https://stackoverflow.com/questions/36239224/how-to-accept-the-free-form-text-as-input-to-amazon-skill-kit