You can contact an HP live agent through HP’s official support channels by following these steps:

1. Go to the HP contact page: https://support.hp.com/us-en/contact-hp
2. Select your product type and enter your device serial number.
3. Choose your country or region from the drop-down menu.
4. Select the option to chat live or get the phone number for your region.
5. Fill out the web form to proceed with contacting a live agent via chat or phone.

Chat availability and hours depend on your region, but typically live chat and phone support are available during business hours and may vary by location[1][2][4][5].

For example, in the United States, live chat for sales is available 7 days a week from 9 am to 12 am EST, and business customer sales lines operate Monday to Friday 8 am to 8:30 pm EST[4].

If chat is not available in your region, HP recommends calling the regional support phone number or submitting a support case online to receive direct contact information[1].

Additionally, some HP regional websites (e.g., Australia) offer live chat via a button at the bottom right of the page during specified local hours (e.g., Monday to Friday 9 am – 7 pm AEST)[3].

In summary, the most direct way to reach an HP live agent is via their official support/contact page where you can choose chat or phone options tailored to your product and region.