In the Future Convenience Store Challenge (FCSC) of the World Robot Summit (WRS), the Customer Interaction Task has been conducted from 2017 to 2020 to propose new services and store designs that can be achieved using robot technology to serve customers in convenience stores in the near future. In the Customer Interaction Task of WRS 2020 FCSC, held in Aichi, Japan, we present a convenience store introducing intelligent space, with new experiences, safety, and flexibility as key concepts. We propose a product recommendation that reflects the owner's intentions, an assistive robot that provides customers desired assistance, and a monitoring service with safety and relief.