A computer receives an incoming call by a cognitive computing service. The computer determines, by the cognitive computing service (CCS), caller details that the incoming call is not within intended recipient preferences, based on comparing the caller details to call log information database and call information database, wherein the call log information database and call information database comprises previous caller details. The computer references, by the CCS, additional caller details from the call log information database and call information database relating to the caller details. The computer determines whether an intended recipient of the incoming call would reject the incoming call and based on the computer determination that the intended recipient of the incoming call would reject the incoming call the computer rejects the incoming call.