An engineer is building an order-lookup flow that must pause and wait for the user to type their email address before the flow continues. The action already has an opening text step. Which step configuration should the engineer add next to capture the user's email?

A 'Customer response' step is the mechanism in watsonx Assistant actions that pauses the flow and waits for the user to provide input. Once the user replies, the input is captured and can be stored in a session variable. A 'Set variable' step does not solicit user input; it simply assigns a value programmatically. The correct answer, "Add a step with 'Customer response' configured to accept a free-text or email-format reply, pausing until the user responds", directly satisfies the scenario because it aligns with watsonx Assistant's design principles and the specific capability being tested. The incorrect options ("Add a 'Set variable' step with a hardcoded default value so the flow can continue without waiting", "Add a 'Connect to human agent' step so an agent can collect the email manually", "Add a 'Search for answer' step that queries an email directory to locate the user automatically") may appear relevant but each misses a key requirement or introduces a step that is either unnecessary or belongs to a different workflow. Mastering the distinction between these approaches is essential for effective watsonx Assistant implementations and is a core focus of the Domain 1: Build Conversational Flows section of the certification exam.