You don't provide much information, but here's a start: Dear X, I would like to arrange a meeting to discuss the new office facilities. Are you available to meet at 2pm on Thursday at my office? If not, please let me know when you are available. Sincerely, Sonya Email is usually a little less formal than a letter, so you could open with just the person's name, without "dear". http://www.businesswritingblog.com/business_writing/2006/01/greetings_and_s.html

Okay, I don't know the content of your e-mail. So, I can't help you there. However, here's some tips for sending a polite e-mail in English. 1) We generally open with Dear [their name here]. 2) Polite conclusions would include: sincerely, [your name] or best, [your name]. Hope this helps. Please tell me if you want something more specific. :D