17 June 2013
It is very risky affair if business is done without maintaining accounts. . In your case ITR 4S will be applicable.
(It is not prudent to purchase a Reservation Ticket in "Tatkal" when the regular booking shows availability.) . You have to furnish more details in ITR-4 like Gross Profit and Expenses.
18 June 2013
Agree with the Expert.. For being on the safer side and as the complete information will not be available for filling the ITR it will be better to go for ITR-4S.