abc parcel

Overview

A demo built for a fictional parcel delivery company to show what AI customer support can look like in production. Users can chat or call, switch languages mid-conversation, and get answers grounded in a company FAQ knowledge base.

Category-Aware RAG

Generic semantic search often returned tangentially related content. The solution: a two-phase retrieval strategy with 14 predefined categories. The system first detects query category from keywords, then filters ChromaDB results by category with graceful fallback to full search if filtered results are empty.

# Phase 1: Auto-detect query category
category = detect_category(query)  # 14 predefined categories

# Phase 2: Filter by category, fallback to full search
results = collection.query(
    query_embeddings=[embedding],
    where={"category": category}  # Precision filter
)

# Graceful fallback if filtered results empty
if not results['documents'][0]:
    results = collection.query(query_embeddings=[embedding])

Result: 40% improvement in response relevance for category-specific queries while maintaining recall through intelligent fallback.