No, in the event you do not show up for your flight, your booking will be canceled and you will have to contact the nearest Qatar Airways reservation office or customer contact center for assistance. Subject to the ticket fare rules and conditions.
If you have booked your ticket through a travel agency, Please contact your agent directly.
For assistance contact your local offices, contact details can be found in the following link https://www.qatarairways.com/en/worldwide-offices.html