【词汇讲解】
chat someone up 搭讪 (phrasal verb)
(UK, informal) to talk to someone in a way which shows you are attracted to the person.
love at first sight 一见钟情(expression)
falling in love when seeing a person for the first time.
Date约会 (n.)
a social meeting between two people or a sweet fruit of the date palm. In the conversation, the man is playing with the word 'date' which can mean a fruit or a social meeting.