Dear Sir or Madam, I am writing to enquire about the tour guide training courses at SGV Vocational School that I saw in your advertisement. I am very interested in becoming a tour guide because I enjoy travelling and learning about different cultures. First, I would like to know how long the course lasts and how many classes are held each week. In addition, I wonder if the apprenticeship is paid and how long it usually takes. I would also appreciate it if you could tell me more about the course fees and whether there are any extra costs for materials or field trips. Finally, could you please inform me about the starting dates of the upcoming courses and the application process? I look forward to receiving your reply soon. Yours faithfully, Minh