It is common to ask a caller to communicate via a queue?

Originally the team was thinking of developing a C# service for a parent company. The service would receive requests and then the service would ping a 3rd party and return the result. Instead of it being synchronous, we decided we would have an AWS SQS and SNS queue for both requests and results. Our company would give credentials to our AWS for the parent to write and notify from a request queue. Then this service wouldn't be a service, it would be a processor. It would then read from the queue and sent the requests and writeback the results to another SQS, SNS that would notify an API on the parent company side. Is this a good design? We are bypassing the use of services to prevent having to have retry logic and having to develop clients, rather we just communicate via queues.