German aviation giant Lufthansa Group has slashed its financial forecast for the year following a disappointing performance in the second quarter. The firm – which encompasses Germany’s flagship Lufthansa Airlines and a number of subsidiaries – said on Friday that its bottom line fell on the back of lower ticket revenues, especially for travel to Asia. In the second quarter, Lufthansa Airlines made a profit of only €213 million ($232 million), down from €515 million in the same period last year, the company announced in Frankfurt. The group now has a loss of €427 million on its books for the f…