as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
construct an appropriate regular expression for a valid email address.
user
^[a-za-z0-9._%+-]+@[a-za-z0-9.-]+\.[a-za-z]{2,3}$
assistant