The world's largest online travel services company said its bookings in the latest quarter slowed due to the acquisition of rival Orbitz Worldwide Inc, "self-inflicted" wounds such as technology upgrades and the recent spate of attacks in Europe. "Travel demand to France is a particular challenge. With each subsequent event we have seen a worsening of the trend," Chief Financial Officer Mark Okerstrom told Reuters. However, bookings out of the United States into London accelerated once the pound fell against the dollar following Britain's vote on June 23 to leave the European Union, he said. The higher promotions and discounts by Expedia led to a 5 percent drop in revenue per room night in the second quarter ended June 30. Get the full story at Reuters Read also "Expedia struggles to integrate Orbitz after acquisiton" at Skift, "Expedia shrinks plans for $1.2 billion Seattle campus" at Bloomberg, and "Expedia Expects Boost in second half after disappointing Q2" at The Street