The correct pronoun here would be "your".
The listed possessive pronouns work like this:
"My" refers to the speaker.
"Your" refers to the person being spoken to.
"Her" would refer to a female (not the person being spoken to or the speaker).
"His" refers to a male (Not the person being spoken to or the speaker)
"Our" would refer to the speaker and the person (or people) being spoken to.
"Their" would refer to a group of people or things not including the speaker or the person being spoken to.
"Its" refers to an animal or genderless entity (for example, a dog, a lamp, or a grocery store.)
If you have other questions regarding possessive pronouns, feel free to ask me!