The average Uber or Lyft trip takes 13 minutes. That’s a lot of time to spend sitting next to someone, but not everyone is going to be receptive to a conversation.
Try asking your passenger how their day is going. If they seem open to a conversation, try to entertain them. If they give you a short reply or have headphones in, they would probably rather be left alone.
If you do wind up conversing with your passenger, remember to act professionally and stay away from topics that might be too personal.