To update your Chatify profile go to your profile page here you can update your name, email address and bio.
To change your password go to your profile page where you can update. If you have forgotten your password and can't sign in use our password reset facility where you can get instructions for resetting your password emailed to you.
If you are busy with tasks or away from your computer you can set your online status to 'away' to let your team mates know. From the dashboard click the online/away toggle on the bottom of the left menu: