If the baby is to drink only breast milk, even if you are not there, then give bottles of pumped milk to the person who takes care of your child in the meantime. When you are there, you can put your baby back on the chest.
You can collect the breast milk by pumping 10 to 20 ml from each breast in between. Then store the milk in the refrigerator or freeze them in portions. If you work, you can pump out the missing breastfeeding while you work, put it in the refrigerator and have it fed the next day.
You may prefer a combination of breast milk and baby milk, or you may find it difficult to pump out a large amount of breast milk. A combination of natural and industrial milk is definitely better than stopping breastfeeding.
Before you return to the job (or if you want to breastfeed less), you must gradually reduce the number of nursing meals. Otherwise, your breasts swell and drip. It takes about three to seven days for the body to get used to a missing breastfeeding meal, so always drop one breastfeed a week. This slow reduction also prevents you from getting mastitis.
By about the sixth month, your baby will need less milk and demand more and more solid food. Once it starts with the solid food, the nursing meals are gradually replaced by the complementary foods. It is quite possible that your baby then only wants to breast before bedtime and otherwise drinks from the cup, making bottles completely unnecessary. After the sixth month you can slowly change your baby to the complementary foods. Ideally, replace a breastfeeding meal with a spoonful per month.
Some nursing babies initially refuse the bottle and the new way of sucking confuses them. So endurance is needed. It may help to preheat the nipple a bit and leave feeding to another - it may be that your baby refuses the bottle because it smells your breastmilk. Therefore, it is recommended that the bottled food is always given by someone else. You may even have to leave the room. You can also put your breastmilk into the bottle, giving your child the familiar smell and taste and getting used to the bottle.
And another tip: Change the drinking position of your baby. Turn it with your back against your stomach so that the face points forward.