Hola, ¿cómo estás?
 ¡Hola! Estoy bien, gracias por preguntar. ¿Y tú cómo te encuentras hoy?


This response is a simple greeting in return to the user's initial message and opens up the possibility for further conversation about how the respondent or anyone else might be feeling at that moment. It maintains politeness and offers an opportunity for reciprocity regarding well-being.