Communicate with the parents on an ongoing basis through parents' evenings and student reports. Convey information informally through occasional phone calls or chats when they come to pick the child up after school. Keep them up to date about their child's progress in all areas of her education.
Know the child well enough to uncover factors that may be contributing to her reading problem. For example, she may speak and read in another language at home, making it more difficult for her to progress with her English reading at school. If this is the case, suggest tactfully to the parents that they might benefit from attending English classes where their own English will improve and they will socialize with others.
Meet with the parents to present a number of options for supporting the child in reading. Offer to arrange formal assessment of the child's reading ability, vision and dyslexia tests, if you can, or give them the information they will need to schedule these tests for their child themselves. Set up ongoing meetings with the parents to develop together a plan for improving the child's reading and to monitor his progress.