Renu: Do you have change for Rs.500/- note?
Laila: Yes, I have. What do you need it for?
Renu: I need some change for metro train.
Laila: How do you want it?
Renu: Please give me four hundred rupee notes and two fifty rupee notes, if possible.
Laila: Take three hundred rupee notes, three fifty rupee notes, and five ten rupee notes. I hope it will solve your problem.
Renu: Definitely. I am so thankful to you.
Laila: What have I done for you that you are so thankful? I have given you five hundred rupees and you have given me five hundred. I haven’t given you any extra money.
Renu: Still it is a help.
Laila: Why don’t you get a smartcard for metro? You don’t have to buy a ticket everyday.
Renu: Yes, I think I must get one. It will save a lot of time. I won’t have to stand in the queue again and again, and arrange for change.
Laila: I also have a smartcard, though I travel only once or twice a week by metro.
