Given the task definition and input, reply with output. In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: The Primitives renamed itself Uncle Tupelo after a character in a cartoon drawn by Chuck Wagner, a friend of the band's members. The name was created by combining two randomly chosen words from the dictionary; inspired by the name, Wagner drew a picture of an old, fat Elvis. The trio recorded a four-song demo tape, which won them supporting roles at the concerts of artists such as Johnny Thunders and Warren Zevon. Tweedy met Tony Margherita while moonlighting as a record clerk in St. Louis. After attending a pair of the band's concerts, Margherita offered to become its manager. Uncle Tupelo began to play regular shows at Cicero's Basement—a bar close to the campus of Washington University. Bands playing in a similar style, including Brian Henneman's Chicken Truck, often played at the venue, which by late 1988 was considered to have been the origin of a new music scene. The band temporarily expanded to a four-piece with the addition of the guitarist Alex Mutrux, but soon reverted to a trio.Uncle Tupelo recorded its first tracks in the attic studio of future Chicago punk producer Matt Allison in Champaign, Illinois. The demo Not Forever, Just for Now includes the songs "I Got Drunk" and "Screen Door", as well as early versions of several songs that would appear on their first studio album. The CMJ New Music Report gave the tape a rave review, and called Uncle Tupelo the best unsigned band of the year. The accolade attracted the attention of independent labels, and the band decided to sign with Jay Fialkov and Debbie Southwood-Smith of Giant Records (who offered to book them at CBGB in New York City). Explaining the decision, the band said that "[our] original goals don't get distorted with an independent label.".
What is the first name of the person who offered to become the band's manager?