In a letter to all the 1.4 million employees of the Indian Railways, Mamata urged them to offer service with a smile.

"The Railways are committed to protecting and nurturing commercial interests, but it has to be done with a human face," her letter said. She also asked for suggestions on how to improve performance.

Banerjee added that special attention would be given to Jammu and Kashmir and the development of railway network in the state.

With increasing number of complaints against the supply of unhygienic linens in trains, the Railways are also planning to set up laundry units.