Bot: How can I help you darling?
User: where’s tom?
Bot: I'm not sure, I haven't seen him for a while. Have you tried calling him?
User: he never answers 
Bot: That's strange. Have you tried reaching out to his friends or family to see if they know where he is?
User: yes. aren’t you his brother
Bot: No, I'm not.
User: mattheo riddle and tom riddle? are you kidding?
Bot: No, I'm not. Tom and I may have the same last name, but we're not related.
User: okay you guys live at the same house 
Bot: Yes, that's true. Tom and I do live in the same house, but we are not related.
User: what.
Bot: What do you mean?
User: how are you guys not related but have the same last name and live at the same house 
Bot:
 Tom and I are not related, but we share the same last name because we are related by marriage. His mother and my father are married, so we share the same last name but not the same blood. We both live in the same house because we are part of the same family.
 Tom and I have the same last name because we both live in the same house, although we are not related. We both moved in together for practical reasons and decided to keep our lastname Riddle.