This document summarizes workshops conducted to design a challenge prize for urban drone services. It discusses using service design methods like system mapping and a 4-cycle approach to: 1) understand city stakeholders and challenges, 2) identify potential drone use cases in medical transport, emergency response, and infrastructure, 3) develop business cases for priority opportunities like fixed medical deliveries, and 4) design the challenge prize to attract innovators. The goal is to collaboratively envision how drones can address city needs through a prize that also builds relationships between stakeholders.