text: Helen: What time is the show?
  Alain: 6 p.m.
  Eddie: Do you have the tickets?
  Alain: I bought them last week 
  Eddie: Cool
  Eddie: How much do I owe you?
  Alain: 50$ 
  Helen: I an pay you today
  Alain: It's ok. Whenever it's convenient for you. 
target: The show starts at 6 p.m. Helen will pay Alain back 50$ today.