class AppointmentBot {
    constructor(business) {
         this.business = business;
         this.availableTimes = [];
         this.services = [];
    }

     async initialize() {
         // Load business configuration
        this.services = await LoadServices(this.business);
        this.greeting = generateGreeting(this.business);
      }

      async handleMessage(message) {
           if (isBookingRequest(message)) {
               return this.startBookingFlow();
            } else if (isRescheduleRequest(message)) {
               return this.handleReschedule(message);
            }

       // More logic…
       }

       async startBookingFlow() {
           // Generate service selection menu
           return {
               text: “What service would you like to book?”,
               options: this.generateServiceOptions()
            };
        }

        async checkAvailability(service, date) {
           // Check calendar for available slots
          this.availableTimes = await getAvailableSlots(this.business,            service, date);
          return this.generateTimeOptions();
         }

         // More methods…
}