Comcast -
Interviews for asylees are selected randomly for quality monitoring or to ensure information on the application is correct. In either case, just make sure you take all the documents listed (if any) on the interview sheet with you. Here is what is says about interviews for asylees:
The service center will evaluate each application and determine whether an interview is necessary. The Service may decide to adjudicate an application without an interview in cases where the evaluation does not indicate questions concerning the applicant's eligibility for adjustment of status. Service center adjudication officers are trained to refer to the local offices any application that appears to warrant an interview.
The service center will refer to the local offices for interview and adjudication all cases indicating higher risk or complex issues, such as criminal charges, indications of fraud, changes in the country conditions upon which a refugee or asylees status was based, or asylees who had entered the United States without inspection. As an additional tool to monitor the integrity of the adjudications process and any emerging trends affecting the exercise of the Service's interview determination authority, the service center will refer to the local offices for interview a random sample of at least 2 percent of all other refugee an asylee adjustment applications. In all cases where a service center refers an adjustment application to a local office for adjudication, the receiving office will complete and return to the service center an interview referral processing worksheet, which will be reviewed as an indicator for any additional interview referral criteria that should be implemented.
I hope this explains the process to you. Goodluck on your interview. Be sure to let us know how it went.