<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def to_dict(self, *args, **kwargs):
 """Override `falcon.HTTPError` to include error messages in responses."""

        ret = super(HTTPError, self).to_dict(*args, **kwargs)
        if self.errors is not None:
            ret["errors"] = self.errors
        return ret