Jim Cassidy Was a New Paralegal at a Small Litigation

Jim Cassidy was a new paralegal at a small litigation firm.He was unfamiliar with the computer system used to record important deadlines.Jim's supervising attorney,Jack Parsons,over an hour in detail about her case.However,the following week Jane called Jack and told him she had decided to hire a different attorney to handle the matter.Bob Schnagle called Jack to make an appointment to discuss the dispute and possible representation.Can Jack accept the case on behalf of Bob? Explain your reasoning based on the relevant ethical rules.