diff --git a/msg/chat.go b/msg/chat.go
new file mode 100644
index 0000000..3e0f754
--- /dev/null
+++ b/msg/chat.go
@@ -0,0 +1,30 @@
+package msg
+
+import (
+	"crypto/ed25519"
+	"mime"
+
+	"github.com/bahner/go-ma/msg"
+)
+
+const (
+	CHAT_SERIALIZATION = "plaintext"
+	CHAT_MESSAGE_TYPE  = "chat"
+)
+
+var CHAT_CONTENT_TYPE_PARAMS = map[string]string{
+	"type": CHAT_MESSAGE_TYPE,
+}
+
+// New creates a new Message instance
+func Chat(
+	from string,
+	to string,
+	content []byte,
+	priv_key ed25519.PrivateKey) (*msg.Message, error) {
+
+	mimeType := msg.CONTENT_TYPE + "+" + CHAT_SERIALIZATION
+	contentType := mime.FormatMediaType(mimeType, CHAT_CONTENT_TYPE_PARAMS)
+
+	return msg.New(from, to, contentType, content, priv_key)
+}
diff --git a/msg/reply.go b/msg/reply.go
new file mode 100644
index 0000000..ab0b4dd
--- /dev/null
+++ b/msg/reply.go
@@ -0,0 +1,62 @@
+package msg
+
+import (
+	"context"
+	"crypto/ed25519"
+	"mime"
+
+	"github.com/bahner/go-ma/msg"
+	"github.com/fxamacker/cbor/v2"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+)
+
+const REPLY_SERIALIZATION = "cbor"
+
+var REPLY_CONTENT_TYPE_PARAMS = map[string]string{
+	"type": "reply",
+}
+
+type ReplyContent struct {
+	// Id of the messagew to reply to
+	RequestID string `cbor:"requestID"`
+	// Reply content
+	Reply []byte `cbor:"reply"`
+}
+
+func NewReply(m msg.Message, reply []byte) ([]byte, error) {
+	return cbor.Marshal(
+		&ReplyContent{
+			RequestID: m.Id,
+			Reply:     reply,
+		})
+}
+
+// Reply to a message. requires the message to create a reply containing the id of the requesting message
+// The message is not a pointer, as we only need the ID and then throw it away.
+func Reply(ctx context.Context, m msg.Message, replyBytes []byte, privKey ed25519.PrivateKey, topic *pubsub.Topic) error {
+
+	replyContent, err := NewReply(m, replyBytes)
+	if err != nil {
+		return err
+	}
+
+	mimeType := msg.CONTENT_TYPE + "+" + REPLY_SERIALIZATION
+	contentType := mime.FormatMediaType(mimeType, REPLY_CONTENT_TYPE_PARAMS)
+
+	reply, err := msg.New(m.To, m.From, contentType, replyContent, privKey)
+	if err != nil {
+		return err
+	}
+
+	err = reply.Sign(privKey)
+	if err != nil {
+		return err
+	}
+
+	envelope, err := reply.Enclose()
+	if err != nil {
+		return err
+	}
+
+	return envelope.Send(ctx, topic)
+}