1. A computer-implemented method for a third-party company to assist companies in providing customer support to their customers, the method performed by one or more servers of the third-party company and comprising: receiving authentication information of a first customer service representative from a first device, wherein the first customer service representative assists customers of a first company; updating a data store of customer service representatives using the authentication information of the first customer service representative, wherein the data store of customer service representatives comprises information about a plurality of customer service representatives; providing a graphical user interface to allow the first customer service representative to assist customers of the first company; establishing a customer support session between a second device of a first customer and the first device of the first customer service representative; receiving identifying information of the first customer from the second device; receiving a first message from the second device seeking support from the first company; transmitting the first message to the first device for presentation to the first customer service representative; retrieving, from a server of the first company, company data, wherein the company data comprises information about at least one of the first customer or the first company; selecting an intent of the first message from a plurality of possible intents by performing semantic processing of the first message; selecting a template from a plurality of templates using the selected intent, wherein the selected template is associated with one or more intents and the selected template comprises a variable; generating update data by rendering the template using the company data, wherein rendering the template comprises replacing the variable with a value from the company data and wherein the update data comprises an update to a portion of the graphical user interface presented to the first customer service representative; transmitting the update data to the first device to update a portion of the graphical user interface presented by the first device; receiving from the first device, an input of the first customer service representative at the first device; and transmitting a second message to the second device using the input of the first customer service representative.