spring boot microservice architecture

guys i am trying to build spring boot web app microservice architecture, so i have one microservice called movie micro service i am using h2 in memory db this microservice listents to port 8181 in service layer i have methods get all movies, find movie by name, add movie, update movie, delete movie in controller layer i am using my service layer methods i have eurika server and api gateway for microservices, now question for example what would in my case second microservice be ? can u give me example ? for example buy ticket microservice or what ?