If you chat or want to chat with that particular girl, then it is important to take care of some things. Know what to do, not only will the girl talk to you well but you will also make a place for yourself in her heart.
Eventually you are going to talk to the girl you love for a long time. So it would be better to do some preparation beforehand. Check out her social media profile and know what she likes, what she does.
Now that you have started talking to him on chat then talk on fun topics. Imagine what could happen if the girl enjoyed talking, not boredom or anger.
Do not start talking about someone else
Before starting a chat with the girl, keep your attitude correct and be confident. Girls like boys who are ambitious. Talk in a simple and natural way. Do not show those who are there.
It would be better if you talk to him about it and not someone else. Learn about him first such as his likes, dislikes and then talk about it. Also tell about yourself so that they know you and feel about you.
After such a lengthy conversation, it is time to be patient. Give him a chance to miss you. Meaning do not message for a while so that he misses you. After that, start a simple conversation again on some pretext.