1. A system comprising: a processing device; and a memory coupled to the processing device and storing instructions that, when executed by the processing device, cause the system to perform operations comprising: presenting a user communication agent within a display interface of a device; presenting, concurrent with a presentation of the user communication agent within the display interface, a user input interface that executes on the device independently of the user communication agent executing on the device, wherein the user input interface is configured to receive one or more inputs that are perceptible to the user communication agent; while the user communication agent is presented within the display interface, receiving, within the user input interface, a selection of a transaction initiation control, wherein the selection of the transaction initiation control within the user input interface configures the user input interface to receive one or more inputs that are not perceptible to the user communication agent; while the user communication agent is presented within the display interface, receiving a selection of an identifier presented within the display interface; in response to the selection of the identifier, presenting a numeric input interface within the display interface; receiving a numeric input via the numeric input interface; presenting a transaction confirmation control within the user input interface; and in response to a selection of the transaction confirmation control, executing a secure transaction with respect to the selected identifier and the numeric input.