Booking Holdings Inc.’s (BKNG) subsidiary, KAYAK, unveiled an upgrade to its travel management solution for small and medium-sized businesses (SMBs).KAYAK for Business now offers full trip management, seamless group bookings and 24/7 travel agent support at a flat fee of $20 per trip.It also offers VIP account management, flexible payment methods, travel tracking and reporting, and access to corporate rates.Booking Holdings is expected to gain solid popularity among SMBs on the back of this latest upgrade.B ...