SQL query

How to choose using SQL language the record that has status 'not reached' and the minimal end_date?

table description:

SQL> desc t_milestones

 Name                            Null?    Type
 ------------------------------- -------- ----
 NAME                                     VARCHAR2(50)
 DEADLINE                                 VARCHAR2(10)
 END_DATE                                 VARCHAR2(10)
 STATUS                                   VARCHAR2(15)
 MILESTONESID                    NOT NULL NUMBER(5)
 PROJ_ID                                  NUMBER