If you want to be trusted, build the reputation that you can be trusted.
You can build it by showing consistency through your words and actions. At the same time, following through with your commitments and the things you promised to deliver shows that you are reliable.
A trustworthy person is also accountable for their actions. They’re not afraid to admit when they are wrong. Trustworthy people are also honest and transparent, never seizing opportunities to manipulate circumstances or information.