We agree with the reviewer's comments. As advised by the reviewer, the content of the scenario was additionally reflected in the abstract. The contents are as follows.
The motivation of the paper is still unclear for me in the introduction, and the reasons for the limitations of smart city services are not clear in Section 2, but is much better explained later in the paper, which is a nice improvement. I believe that explaining standard constraints (due to the multiplicity of service providers) and coupling between services in the introduction to motivate the paper would be valuable. Indeed, if my understanding is correct, they are the factors that cause the limitations of smart city services the authors want to address.