A computer receives a first attempt at communication made via a first communication channel and stores a first attempt record corresponding to the first attempt at communication in an attempts file. The computer receives a second attempt at communication made through a second communication channel that is different from the first communication channel and stores a second attempt record corresponding to the second attempt at communication in the attempts file. The computer queues at least a portion of the first attempt record and at least a portion of the second attempt record. The computer determines that the first attempt at communication and the second attempt at communication were created by a common sender, determines a third communication channel for replying to the common sender, and transmits a third attempt at communication to the common sender via the third communication channel.