An Overnight Guest Service Agent job description can be summed up as providing exceptional customer service to guests staying at a hotel during overnight hours. In this role, you'll be responsible for checking guests in and out of their rooms, handling any requests or concerns they may have, and ensuring that their stay is as comfortable as possible. You'll need to be knowledgeable about the hotel's amenities, policies, and services, and be able to answer guests' questions accurately and promptly,