I am not an English teacher, but what I have seen of some of the English schools here, the only requirement needed is a pulse! Has your waitress attained any level of English? I do not work, but I am willing for to have conversational English with her for food and beverages only, and taxi from/to Nisora Tower, or a close friend offers English lessons any grade and will travel to the students home or workplace.
Suggest you send me a private message for contact details as the moderator gets shirty about leaving phone numbers ect.