  Poor nutrition can lead to reduced immunity, increased susceptibility to
disease, impaired physical and mental development, and reduced productivity. A
conversational agent can support people as a virtual coach, however building
such systems still have its associated challenges and limitations. This paper
describes the background and motivation for chatbot systems in the context of
healthy nutrition recommendation. We discuss current challenges associated with
chatbot application, we tackled technical, theoretical, behavioural, and social
aspects of the challenges. We then propose a pipeline to be used as guidelines
by developers to implement theoretically and technically robust chatbot
systems.
