@startuml
skinparam monochrome true
skinparam packageStyle rectangle
skinparam shadowing false

title System Sequence Diagram (SSD)

autonumber

actor "Human Resources Manager\nEmployee" as Employee
participant ":System" as System

activate Employee

    Employee -> System : asks to create and add new skill
    activate System


        System --> Employee : requests data (skill name)
    deactivate System

    Employee -> System : types requested data

    activate System

        System --> Employee : shows all data and requests confirmation
    deactivate System

    Employee -> System : confirms data
    activate System

        System --> Employee : displays operation success
    deactivate System

@enduml