A key stakeholder of the project is contacted for a requirements document approval, but shows no interest. The project manager decides to have a friendly, informal discussion with him to understand the reason for his lack of interest. During the conversation, the stakeholder expresses his displeasure that two of his key suggestions were not addressed on the project. He feels as though his approval or feedback doesn't really matter since his main requirements are not being captured. What is the best option for the project manager in this case?