The sweetest sounds in the universe - "chai chai"

Now and then IR make of passengers fun fun fun
A large number of Flexifare trains they run run run
Where passengers arn't many but some some some
Passengers pay through noses yet keep mum mum mum
With...
more...

new flexifare scheme again they come come come
=
Pretending as big brother they appear chum chum chum
but for a confirmed reservation they make you run-run-run
Without touching hands they ring the bell ton-ton-ton
Fares have not been increased they drum drum drum
Yet they make passengers pay more sum sum sum