If you notice the mistake before your itinerary is issued, you may be able to cancel the booking and request a refund. The status of your booking will show as Processing.
If your itinerary is issued, it may not be possible to correct the error without a booking change or cancellation. Depending on the conditions of your booking there maybe a costs associated with the change or cancellation.
Please contact the Customer Support team immediately via chat or email at support@travala.com for assistance.