AI conversational model

I am looking for a freelancer who can create AI conversational model.

This model should be able to discuss creating tree structure and send action request to API.

Example:

User: Hi I would like to create new house.
AI: Hello, of course, tell me more about it.
User: House has 2 floors and 3 bedrooms.
AI: Ok, looks nice. Where you would like to have kitchen?
AI commands: {"create project new-house","update new-house add floor1", "update new-house add floor2", "update new-house add room bedroom1", "update new-house add room bedroom2", "update new-house add room bedroom3"} <-- the most critical thing - sending commands based on user idea with respect of possibility of final model
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Idea is to send commands from AI model to create/update/delete elements in user project -> JSON object

Each project has the same large JSON schema describing what is possible to add to project and all fields in sub-tree. -> basically what is possible to add, what is required and how many fields specific object contains.