By Ilona Wissenbach and Joanna Plucinska FRANKFURT (Reuters) -Lufthansa is expected to announce several thousand job cuts on Monday at the airline's first company-wide capital markets day in six years, two sources close to the matter said, as it seeks to reassure investors of its commitment to efficiency. Shares in Lufthansa, Europe's largest airline by sales, rose 3.4% to their highest level in more than three weeks after Reuters reported the planned cuts. They were up 1.7% at 1423 GMT. Analysts and in ...