Serge worked for Service Attendant Corporation (SAC). He requested time off under the Family and Medical Leave Act (FMLA) from April 29 through May 31 to undergo treatment for alcoholism. For the month of May, he was hospitalized as part of the treatment. When he did not return to work on June 1, SAC fired him. Did SAC violate Serge's rights under the FMLA? Explain your answer.