Send me your form I will update and send it to you

Are you looking to create pdf forms?  

In your JavaScript code are you able to access the response? If yes you can set the value of the field in your adaptive form using the guide bridge api or have you considered using form data model to connect to your database and interact with the database using adaptive form based on the form data m...

What is the use case?

we will be updating the document with the necessary changes Thanks

Are you looking for a tool to create pdf forms? Were you using Adobe LiveCycle designer in the past? If you are looking just to buy AEM Forms Designer previously known as Adobe LiveCycle Designer, it is not sold separately. It is part of AEM Forms

Make sure you are extending sling all methods servlet

Designer comes with AEM Forms you cannot buy only designer 

https://experienceleague.adobe.com/docs/experience-manager-65/forms/upgrade-aem-forms/aem-forms-jee-upgrade/upgrade-forms-jee.html?lang=en

there are 2 flavors of AEM Forms AEM Forms J2EE - it needs an application server like jboss/websphere AEM Forms OSGI