The world’s largest travel review site has started offering users the opportunity to make a booking without leaving TripAdvisor, in addition to its price comparison service. However, the larger online agencies, including the two biggest; Expedia and parent Priceline, have so far refused to integrate with it. Kaufer said it remains to be seen whether compromises it was willing to make would convince the OTAs. “Instant Booking changes every week. As some changes happen maybe some big OTAs will say it looks a bit more like what we want to participate in." In a previous session at PhoCusWright, Expedia boss Dara Khosrowshahi indicated Instant Book could turn out to be a “dumb pipe” for Expedia, while the chief executive also expressed doubts. Get the full story Travolution