<human>: So I was hired with a restaurant before it was even open. About 2 years in I get promoted from being a crew member to being a shift leader. That's cool and all but my raise was only $1 more an hour. I feel that for the work I do(managing employees, taking inventory of food, operating POS system, counting money, ordering food) my pay is extremely low. Only $10 an hour. To make matters worse, when I'm not working a manager shift, I only make $9 an hour(the same pay as all the new hires). After being with this company so long, and having pretty significant responsibilities for my pay, how do I go about having a conversation with my GM about getting a raise? If so, any restaurateurs know how much I should be getting paid given my responsibilities?

Summarize the given text in a few sentences.
<bot>: Have been with same restaurant for 3 years. Never had a raise and no sign of getting one soon. How do I professionally ask for a raise?