When you drop your car off at the dealership ask if they could check/confirm water pump is leaking whilst car is on hoist having the oil drained, or you could confirm this yourself by using a small mirror on a stick and a bright light source holding mirror up under water pump looking at weep hole. Also ask for a diagnostic check and printout, check eng light may have come on due to low coolant??, but there may be another reason for it, a fault code should have been logged and will be in printout.