Unstructured interviews are interviews that do not have a fixed format or script, and are more flexible and spontaneous. The interviewer may ask different questions to different candidates, depending on their resume, background, or interests, and may also engage in casual conversation or rapport-building. The questions are usually more open-ended, subjective, or hypothetical, and the interviewer may not use a formal rating system to score the responses. Unstructured interviews are often used to assess the candidates' personality, motivation, or fit for the culture and values of the organization.