Task: Question Answering
Input (English): Passage: Alex Gates is a wine merchant living in Miami who has distanced himself from his alcoholic wife Suzanne with his philandering, and from his stepson Jason with his indifference. Alex is heavily in debt, and hatches a plan to steal a valuable diamond necklace from the house of his clients, the Reese family, where his Cuban mistress Gabriela works. He cases the house during a wine delivery with Jason, who works in Alex's business, although not happily. Jason becomes attracted to Gabriela, unaware of her relationship with his father.
On the day of the heist, Alex and his British safe-cracker partner Victor arrive at the house under the pretense that the Reeses' wine cellar needs repairs, otherwise their wine will be ruined. Gabriela was supposed to let them in, but she was fired the day before. Fortunately, Alex had cultivated a relationship with the security guard and is able to convince him to admit them. Victor sends Alex and the guard off on an errand while he works on the safe, but a second guard becomes suspicious, although Victor is able to complete the job before being discovered.
The pair decide that Alex will pawn the necklace in New York City, and he invites Gabriela to go with him. As he is packing, Suzanne chances upon the airline tickets for him and Gabriela and immediately realizes he is having another affair. The two of them get into a physical alteration and she knocks him out. Deciding to leave him, she empties out his suitcase, where he has hidden the necklace, and uses it for her own clothes. Jason walks in and the two of them flee to the Florida Keys. Upon arriving, they discover the necklace, but Suzanne doesn't want to keep it, even after Jason has it appraised, discovering it is worth $1 million. Jason also visits Gabriela back in Miami, giving her the phone number of the place they are staying at. 
Question: What is the first name of the person who cases the house?
Output (English): Alex.