@startuml
'https://plantuml.com/sequence-diagram

autoactivate on
autonumber

actor "Person" as Person
participant ":System" as System

activate Person

Person -> System: asks to update description of a category
System --> Person: shows all existing categories and \n asks to select the one to be updated

Person -> System: selects the intended category
System --> Person: shows description of the select category \n and requests the new description

Person -> System: types the new description
System --> Person: informs operation success



@enduml