Summary: Added RingCentral Virtual Assistant

Why It Matters: This adds a new way for people to get help on the website.

What Changed:

• The page title changed from "(1) New Messages!" to "404 Error - Sorry, page not found | RingCentral US".
• The phone number for "Talk to an expert" changed from (888) 416 4737 to (866) 837 5190.
• The "Our chat is currently unavailable" message was removed.
• A new section for "RingCentral Virtual Assistant" was added.
• This new section includes text about dropping a file, no conversation, and how RingCentral can help.
• It also includes a privacy notice and terms of use for chatting.
• A "Chat with us" form was added with fields for email, first name, last name, and mobile phone.
• A new phone number (1-800-574-5290) was added for calling.