Either it's a social call like a date or a partyor a casual business deal such as selling a laptop on Craigslist. In most cases, the tips here will cover both, but always be careful to take precautions for your specific scenario. Traditional wisdom says that you should give out as little information about yourself as possible when meeting someone online. Ironically, your first goal when meeting someone else is to find out as much of that information they shouldn't be sharing online as you can. You should always be careful sharing info online, but if you're going to anyway, focus on finding safe places to contact people.
You can start moving from general to specific as soon as you are finished with previous steps. While describing the context of your thesis statement, try to narrow down each sentence, making them more specific.
This will help you to lead a reader from an opening sentence to the thesis statement.