Don't ask for favors from your manager until you step up and do what's expected from your manager. Make sure you do your part and that you are giving it your all, otherwise your asking might just be an opportunity to review your situation and value to the organization, and you might not be pleased with the outcome. If you show up every day and work to excel in all that you do, then you shouldn't have to be concerned about conversations like this and you your value to the team. Make a difference and make an impact to the organization every day so that your value is never questioned and that your manager won't ever say they can do without you. That way when or if you ever need a favor, that it is done more based on who you are and your character than what you have done. After all having the right character models the way for others, and sets an example for those around you.