KLM is good. It would mean that that particular flight is a codeshare flight which would typically be the manner in which airline advertise those flights.
Suppose you buy a ticket from KLM for a flight from say New Delhi to Toronto. You would have to catch two flights from say Delhi to Amsterdam and a second one from say Amsterdam to Toronto. Then chances are that the first flight would be operated by KLM with their own aircraft and the second one would be operated by Air Canada or any other company. Codeshare agreement allows airline companies to advertise each other's flights in their own names rather than their partner's names for that particular journey. So, if you bought the ticket from KLM, you would get the ticket in which both the flights would be mentioned as of KLM when in fact the second one would be operated by another company and KLM just uses their name on the second flight too, just to market the flight as a single one. In the ticket , if you look below the second flight name, it will be mentioned that the flight is operated by Air Canada or Air France or any of the other companies that partners with KLM. The second flight is basically not of KLM, but a separate individual flight but since we are buying a ticket through KLM and KLM wants to provide a route from New Delhi to Toronto on a single ticket, they have partnered with the second airline company so that KLM can use their flight to transfer the passengers who wants to go to Toronto from Amsterdam where it's first journey ends.
