cmd/core-runtime/main.go

@@ -541,6 +541,10 @@ func main() {
 				continuationMessage = continuation
 				travelContinuation = true
 				effectiveTaskMessage = continuation
+			} else if continuation := interactiondomain.ContinueTravelDate(effectiveTaskMessage, conversationHistory); continuation != "" {
+				continuationMessage = continuation
+				travelContinuation = true
+				effectiveTaskMessage = continuation
 			}
 		}
 		if request.ConversationID != "" && interactiondomain.IsRetryRequest(utterance.Content) {
@@ -567,7 +571,11 @@ func main() {
 			continuedSemantic, continuedErr := interactiondomain.InterpretUtterance(continuedUtterance, projects, previousFocus, now)
 			if continuedErr == nil {
 				continuedSemantic.Interpretation.Source = "CONVERSATION_CONTINUATION"
-				continuedSemantic.Interpretation.SelectionReason = "location follow-up completed the previous local-search task"
+				if travelContinuation {
+					continuedSemantic.Interpretation.SelectionReason = "travel follow-up completed the previous travel task"
+				} else {
+					continuedSemantic.Interpretation.SelectionReason = "location follow-up completed the previous local-search task"
+				}
 				semantic = continuedSemantic
 			}
 		}

modules/interaction/domain/semantics_test.go

@@ -108,6 +108,19 @@ func TestContinueTravelOrigin(t *testing.T) {
 	}
 }
 
+func TestContinueTravelDate(t *testing.T) {
+	history := []interaction.HumanUtterance{{Content: "Найди билеты до Ялты", ReceivedAtUnixMillis: 100}}
+	if got := ContinueTravelDate("сегодня", history); got != "Найди билеты до Ялты сегодня" {
+		t.Fatalf("date answer did not complete ticket search: %q", got)
+	}
+	if got := ContinueTravelDate("завтра", []interaction.HumanUtterance{{Content: "Найди билеты до Ялты сегодня", ReceivedAtUnixMillis: 100}}); got != "" {
+		t.Fatalf("dated ticket search must not be continued again: %q", got)
+	}
+	if got := ContinueTravelDate("сегодня", []interaction.HumanUtterance{{Content: "Какая погода в Ялте?", ReceivedAtUnixMillis: 100}}); got != "" {
+		t.Fatalf("date answer must not create travel work without travel context: %q", got)
+	}
+}
+
 func TestTravelSearchClarification(t *testing.T) {
 	if got := TravelSearchClarification("Найди билеты", nil); got == "" {
 		t.Fatal("underspecified travel request must ask for missing route and date")

modules/interaction/domain/travel.go

@@ -186,6 +186,34 @@ func ContinueTravelOrigin(message string, history []interaction.HumanUtterance)
 	return strings.TrimSpace(previous + preposition + location)
 }
 
+// ContinueTravelDate completes the most recent unfinished ticket search with
+// a short date answer. The date is still the human's original wording, so the
+// later route and research stages retain its provenance and can interpret it
+// relative to the current time.
+func ContinueTravelDate(message string, history []interaction.HumanUtterance) string {
+	current := strings.TrimSpace(StripAssistantVocative(message))
+	currentTokens := semanticTokens(current)
+	if len(currentTokens) == 0 || len(currentTokens) > 6 || !isTravelDateSpecified(currentTokens) {
+		return ""
+	}
+	latestAt := int64(-1)
+	latest := ""
+	for _, utterance := range history {
+		tokens := semanticTokens(utterance.Content)
+		if !travelCue(tokens) || isTravelDateSpecified(tokens) || containsStemInTokens(tokens, "ближ") {
+			continue
+		}
+		if utterance.ReceivedAtUnixMillis >= latestAt {
+			latestAt = utterance.ReceivedAtUnixMillis
+			latest = strings.TrimSpace(StripAssistantVocative(utterance.Content))
+		}
+	}
+	if latest == "" {
+		return ""
+	}
+	return strings.TrimSpace(latest + " " + current)
+}
+
 // TravelSearchClarification keeps an incomplete travel request in dialogue
 // instead of reducing it to an unrelated generic web search.
 func TravelSearchClarification(message string, history []interaction.HumanUtterance) string {