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
write a regular expression for validating a phone number.
user
^(\+\d{1,2}\s?|0)[1-9]\d{2}\s?\d{6}$
assistant