dalliance
noun /ˈdæliəns/
  /ˈdæliəns/
[uncountable, countable] (old-fashioned or humorous)- the behaviour of somebody who is dallying with somebody/something
- It turned out to be his last dalliance with the education system.
 
 - a sexual relationship that is not serious
 
Word OriginMiddle English (in the sense ‘conversation’): from dally + -ance.