AIR CANADA TO ACQUIRE CALGARY COURIER COMPANY Air Canada, the state-owned airline, said it signed a letter of intent to acquire 65 pct of EMS Corp, a Calgary-based messenger service which operates in Western Canada and the U.S.. Gelco Corp (GEL) earlier said Air Canada agreed to buy its Canadian Gelco Express Ltd unit for 54 mln U.S. dlrs. Air Canada said the acquisitions will complement its main cargo business. It said it expects the courier market to grow by about 25 to 30 pct a year.