Hilchos Maasei Hakarbanos 4:10

All offerings require that the one performing the service have the intention that he is doing so for the type of offering needed and for the one bringing it at the following points: when slaughtering, when receiving the blood, when bringing it to the altar, and when sprinkling it on the altar. This is as per Leviticus 7:15: “And the flesh of his thanksgiving peace offering sacrifice.” We infer that the slaughtering and the other services must be done with the intention of his peace offering, and the same is true for other offerings. If the animal was slaughtered and these other services performed absentmindedly, without any intention, it is acceptable in the case of burnt offerings and peace offerings, and the owner has fulfilled his obligation.

Hilchos Maasei Hakarbanos 4:11

When slaughtering a burnt offering, one must have six intentions: that it’s being done for the appropriate type of offering, for the one bringing it, that it is being offered to God, that it should be consumed by fire, that the consumption by fire is exclusively for the aroma, and that the aroma should be pleasing to God. If one slaughtered an animal with no intentions, it is acceptable, as in halacha 4:10. One who slaughters a sin offering or guilt offering must have the intention that it’s being brought for the sin that was committed.