When you have decided yourself to attend a party to talk to girls, you should first know how to talk to girls at party. You have to be polite while approaching a girl. When the girl is looking at you or occasionally looks at you, simply hallo her and waits for response. When her response is positive, just start chatting. A situation may come when the girl is surrounded by your other friends and you like to draw her attention. At that time, seek an opportunity to introduce yourself willingly or with the help of your friend. Play a role to be the part of the conversation and never try to dominate. Girls will simply consider you as self centered. Listen to her attentively and be curious about her. Notice her body language. If she is interested to pass time with you, keep it up. But if she has to leave you or don’t find interest to talk to you, let her go without forcing.