<human>: My friend has a lot of allergies. What can I do to help him?
<bot>: One thing you could do is make sure he keeps his windows and doors closed when possible, as this will help reduce allergens in the air. You could also try using an air purifier or humidifier in his home to help keep the air cleaner. Additionally, you could ask your friend if he would like some hypoallergenic pillow covers or sheets that are designed to be more comfortable for people with allergies.