alan saw a watch in xyz shop. since it was the first shop he had visited he asked if the watch could be put away until the next day when he would make up his mind. the shop manager offered to keep the watch for 2 days. later in the evening on the same day, alan saw his friend, david wearing the watch and david told him that he had bought the watch from xyz shop. alan quickly returned to xyz shop and said he wanted to buy the watch. the shop manager said that the watch had been sold. please advise alan whether he can sue the xyz shop in the above situation.