If a stranger invites you to conversation pay attention to any of his attempts to find out more about you. If he begins to ask you very personal questions, such as where you live or whether you are alone at home at the moment, it is most likely the attacker.
Remember: if the person in the chat conversation begins with questions about your age, about where you live, where your parents are at home, or ask your contact phone number is a sure sign of danger. If a stranger tries hard to get from you such information, he is most likely not your same age, who wants to communicate, he is attacker.