I am entitled (Part I)

I am entitled (Part I)
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June 30th, 2016, on a train from Roorkee to New Delhi.
Overhead:

There are three young students who enter the train, at a mid-way station, Muzaffarnagar. They all are well dressed. They have either iPhones or Samsungs. They are carrying modern, branded backpacks.
"Hey, our seats are reserved for seat #.s 31, 32, and 33 in train coach, C3. Not C1."
"I am not walking to C3. I am taking seats here ."
As two of them takes seats for 31 and 32 in C1, the third one quietly walks to C3. All the coaches are connected.
Amongst in the group, the shortest one in height was the one who refused to walk to C3.