Care homes that give respite just for a few days are very elusive. The minimum is usually a week. If your dad is not a resident in the UK, I doubt Social Seevices will get involved much apart from maybe giving you a list of local care homes. You might find such a list online as well. Then call them up and ask whether they have spaces and could accommodate and what their rates are. If not subsidised by SS, they can be quite steep. Then go and visit - never book blind!