Hi - I'm travelling with teenagers desperate to get a keratin (or other straightening) treatment at a hair salon in seoul and also a facial. I've seen some hair salons that may have english speakers, but any suggestions on how to make an appointment (it seems like calling is the only way, and I don't speak korean). Are there any suggestions on how to go about finding recommended hair salons and facial providers and making appointments in advance of our visit to Seoul (while we are out of the country) for non-korean speakers?