听力原文：This message is for Luis Pertin. My name is Barney Feldman, and I am a building contractor with Weston Homes. I understand that you would like an estimate on a possible renovation to your kitchen. I believe you want to have a new set of cupboards installed as well as a larger kitchen window built. Although I do not know exactly what type of wood or other materials you would like to use, generally such a renovation would take approximately two weeks to complete. Our cupboards can be built using oak, maple, or birch. If you can let me know what type of wood you would prefer to use, we can determine a better estimate for the renovation. I will be available Monday and Tuesday evening to drop by your home and see what the job entails. Please call me at 647-2687 to determine which evening is best for you. Thank you. What is the purpose of the message?