To complete Bradley Wilson answer, it is very common in trans, queer, non-binary, etc. community to ask someone their preferred pronouns. This way, you know for sure how you should address the person you are talking to and you avoid unintentionally hurting their feelings.
From this LGBT resource center, here is how you should go about asking the preferred pronouns:
Just ask! We encourage our allies to ask rather than assume a person’s pronouns. Similar to a name, we can’t know how to best respect a person in conversation without introductions. We encourage you to introduce yourself with your own pronouns to then open the door for others who feel comfortable sharing their names and pronouns with you to do so. A phrase you might use is “My name is [your name] and I use the pronouns [your pronouns]. Are there any names or pronouns I can use to best respect you?”
It’s okay if a person does not want to share their pronouns with you. Make sure that you don’t force someone to share their pronouns--especially in a public space. If someone doesn’t share their pronouns with you, you can always use their name.