Last month, Leila paid $500 for a plane ticket from Sydney to attend a family wedding in Brisbane. Leila is terrified of flying, and to help calm her nerves, decided to take a sleeping tablet, and to drink a glass of wine. Unfortunately, the combination of the medicine and alcohol caused Leila to act aggressively toward staff at Sky High Airs check-in desk. As a result, the airline cancelled her ticket and advised that they will refund her the $500. Leila believes Sky High Air breached their contract. Discuss whether Leila can sue Sky High Air for breach of contract. (Required: Only address Element 1 (Contract Offer) to establish whether a valid contract existed between Leila and Sky High Air)