Guild Wars does not have built in voice capabilities, so unfortunately no you cannot do that.
You have to use third party methods of using voice if you wish to, the main thing people use is Vent and Team Speak, so you'll have to stick with that.
is there anyone that will play with me online cus im getting a headset tomoz and ive asked on guild wars and everybody just ignores u so, and what software do i have to use and what software doesnt cost anything, what about teamtalk
the best thing to do is to join an active guild that looks to help new players learn the game and uses either Ventrilo or TeamSpeak, make some friends that way and you're all set.