Simplify the following text for a Grade 13 native English-speaking person.
Original: On October 1 , 2010 , the acquisition of Continental airlines by UAL Corporation ( the parent company of United Airlines ) was completed and on the same day UAL changed its name to United Continental Holdings , Inc. .
Simplified: The merger was approved in September 2010 , and the parent company changed its name to United Continental Holdings when United completed its acquisition of Continental .