How do I request Qatar Airways Economy Reserve for an empty seat next to me?

What this answer depends on

• Qatar Airways Economy Reserve; confirmed Economy ticket and Qatar-operated segment
• Explain that you want Economy Reserve for the adjacent space on the named flight. Qatar identifies an airport request process and restricts the product to confirmed Economy e-tickets on its own operation. Standby or unconfirmed tickets do not meet that published eligibility. A partner-operated segment requires a separate operating-airline inquiry.
• The overview and selection eligibility exclude emergency exits, extra-legroom and bulkhead positions. A later clause on the same page mentions extra legroom inconsistently. Do not assume Economy Reserve can be added to one of those positions; ask Qatar to confirm the exact eligible seat arrangement before paying. This guide does not select the more generous wording and treat it as a promise.
• Inspect which passenger and flight the offer covers and retain the payment document. Qatar’s terms tell the buyer to keep the EMD or payment receipt. That is useful evidence of a completed purchase; a vacant seat shown on a map is not equivalent. The source also allows operational changes, so do not describe a particular seat number as immutable.
• Qatar directs Economy Reserve requests to its airport check-in desk or Hamad International Airport transit information desks.
• Economy Reserve requires a confirmed Economy e-ticket on a Qatar-operated flight and is subject to availability at check-in; standby/unconfirmed tickets are excluded.
• The overview and selection terms exclude exit, extra-legroom and bulkhead locations, but a later purchase clause mentions extra legroom inconsistently.
• Qatar requires the EMD/payment receipt to be retained for Economy Reserve and allows operational seat changes.