On April 22nd, the Flight from Shanghai to San Francisco was delayed, which resulted in missing the check-in of the Flight from San Francisco to Phinex. So I changed to take the next flight and delayed my official business in America. More unluckily on April 30th, the UA857 Flight from San Francisco to Pudong, Shanghai was delayed again for four hours. Because it was a long time, so I can‘t understand and need compensation. I wonder if you could give us a saying or a solution.