He can't. If you are an introvert accept the fact rather than pretend and fail at passing yourself off as something you ar not. You can smile and respond more encouragingly at others so that you inspire a similar response, but your thoughtfulness and sensitivity may be valued more highly than the loud and confident laugh and conversation you may be wishing was true of you.
No-one would recommend tha you copy anther person but if he has the behaviours that you most respect, you can consider how far you might be able to develop these without betraying those aspects of your personality that characterise you. We all have some degree of introversion and some of extroversion. You cannot force yourself into mould that is not natural for you. Both of these major types have their value in society.
If you’re an introvert, you can become more extroverted, but don’t expect it to happen overnight. You will need to work at it a bit. The most important thing you will need to do is really make a commitment to change your behavior. Here are some things you can do: observe, learn and practice.
Notice the people around you who are extroverted and watch what they say and do. Later, you can practice the same things with a small group of friends or family members to see if you feel okay being a little more extroverted or if you feel really uncomfortable.