Write a Python function called 'validate_email' that takes an email address and returns True if it is valid, and False if it is not.
user
```python
import re

def validate_email(email: str) -> bool:
    """Validates an email address."""
    regex = r'[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}'
    if re.fullmatch(regex, email):
        return True
    else:
        return False```
assistant