Trip Planner

Architecture Overview

User (Family Trip Intent — Web / Mobile App)
             │
             ▼
  ┌─────────────────────┐
  │  Coordinator Agent  │  ◄── Phase 1: Discovery & Preference Mapping
  │  (Orchestrator)     │
  └─────────────────────┘
             │
     ┌───────┼───────────────────────────────┐
     ▼       ▼       ▼       ▼       ▼       ▼
  ✈ Flight  🏨 Hotel  🚗 Car  🚢 Cruise  🎭 Activities  🎡 Parks
  Subagent Subagent Subagent Subagent  Subagent       Subagent
                                                   ── Phase 2: Parallel Execution
     └───────┴───────────────────────────────┘
             │
             ▼
  ┌─────────────────────┐
  │  Coordinator Agent  │  ◄── Phase 3: Consolidation & Optimization
  │  (Merge + Score)    │
  └─────────────────────┘
             │
             ▼
  Itinerary Proposal + Budget Dashboard  ◄── Phase 4: Human-in-the-Loop Review
             │
      [Human Approves]
             │
     ┌───────┴──────────────────────────────┐
     ▼       ▼       ▼       ▼       ▼      ▼
  Book    Book    Book    Book    Book    Book
  Flight  Hotel   Car     Cruise  Excur.  Parks
  Agent   Agent   Agent   Agent   Agent   Agent
                                        ── Phase 5: Targeted Booking Execution
     └───────┴──────────────────────────────┘
             │
             ▼
  Master Confirmation + Digital Wallet + Trip Dashboard
             │
  ┌──────────┼────────────────┐
  ▼          ▼                ▼
Price Watch  Disruption    Day-of
Agent        Agent         Agent      ── Phase 6: Ongoing Trip Management

Phase 1: Discovery & Preference Gathering

The Coordinator Agent conducts structured intake to build a rich Family Trip Profile.

Phase 1 Integrations

Phase 2: Parallel Search Execution

6 Specialized Subagents spawned and run concurrently by the Coordinator Agent. Parallel execution caps total search latency at the slowest single API call (~3–5 seconds) vs sequential 20–40 seconds.

✈ Flight Search Agent

• Search round-trip, multi-city, and open-jaw itineraries
• Filter results for adjacent/blocked seats for families
• Cross-reference airline baggage policies (stroller, car seat)
• Apply loyalty program filters for points/miles redemption
• Check codeshare and alliance options

🏨 Hotel Search Agent

• Search family rooms, connecting rooms, suites
• Filter by family amenities: kids pool, kids club, babysitting
• Pull TripAdvisor / Google Reviews (family-filtered)
• Check cancellation flexibility policies
• Cross-reference proximity to attractions and airports

🚗 Car Rental Agent

• Search minivans, 7-seat SUVs, MPVs based on passenger count
• Verify car seat and booster seat availability
• Check airport pickup vs. hotel delivery options
• Compare insurance bundles (CDW, liability, roadside)
• Offer peer-to-peer alternatives (Turo)

🚢 Cruise Search Agent

• Search cabin categories: interior, oceanview, balcony, suites
• Identify "Kids Sail Free" and family promotional fares
• Verify port schedules align with overall trip dates
• Check on-board kids programming
• Pre-inventory shore excursions at each port

🎭 Activities & Excursions Agent

• Search destination-specific activities (snorkeling, tours, zip lines)
• Filter by minimum age requirements and child pricing tiers
• Identify group booking discounts for families of 4+
• Check local guide certification and safety ratings
• Flag activities requiring advance booking vs. walk-in

🎡 Theme Parks & Water Parks Agent

• Query crowd calendars for low-crowd visit days
• Search ticket bundle options: single-day, multi-day, park hopper
• Check height and age requirements per ride
• Reserve Lightning Lane / FastPass / Express Pass slots
• Pre-book character dining and priority restaurants

Phase 3: Consolidation & Optimization

The Coordinator performs multi-dimensional optimization after all subagents return results.

Phase 4: Itinerary Proposal & Human Review

Mandatory human-in-the-loop gate — no financial transaction occurs without explicit approval.

Artifacts Generated

Human Review Options

• ✅ Accept individual components as proposed
• ✏️ Modify parameters (e.g., "I want a balcony cabin", "skip the water park")
• 🔄 Re-search a component with revised constraints (triggers targeted subagent re-run)
• ❌ Reject the full proposal and restart from Phase 1

Phase 5: Booking Execution

Upon human sign-off, the Coordinator spawns one dedicated Booking Subagent per confirmed service. Each agent is laser-focused on a single transaction.

Common Booking Agent Behaviors

• Generate unique idempotency key per booking attempt (prevents duplicate transactions)
• Implement exponential backoff on API timeouts (max 3 retries)
• Handle payment tokenization via Stripe/Braintree (PCI-DSS compliant)
• Emit real-time status events to Coordinator Agent
• Fall back to secondary vendor if primary booking API is unavailable

Specialized Booking Agents

Phase 6: Confirmation & Ongoing Trip Management

Background agents run silently from booking confirmation until the family returns home.

Deliverables Upon Booking Completion

• Master Trip Confirmation Document: Single consolidated file with every PNR, reservation number, voucher, and QR code
• Digital Wallet Integration: All boarding passes, hotel reservations, park tickets pushed to Apple Wallet and Google Wallet
• Trip Management Dashboard: Live view of all booking statuses, check-in countdown timers, document checklist

Ongoing Background Agents

AI Agent Best Practices Applied

Recommended Technology Stack

Key Design Principles

Next-Generation Travel Format Extensions

The architecture extends beyond traditional travel into emerging experience-driven formats.

Extended Architecture Modifications