Prefer current travel context in follow-up answers

modules/interaction/domain/semantics_test.go

@@ -113,6 +113,13 @@ func TestTravelSearchClarification(t *testing.T) {
 	if got := TravelSearchClarification("Найди билеты, какой ближайший самолёт", contextHistory); got != "Из какого города вылетать в Сочи и на какую дату?" {
 		t.Fatalf("travel destination should be inherited from context, got %q", got)
 	}
+	noisyContext := []interaction.HumanUtterance{
+		{Content: "Как можно добраться до Сочи?"},
+		{Content: "Какая погода в Питере?"},
+	}
+	if got := TravelSearchClarification("Найди билеты", noisyContext); got != "Из какого города вылетать в Сочи и на какую дату?" {
+		t.Fatalf("unrelated weather history must not replace travel destination, got %q", got)
+	}
 }
 
 func TestInterpretUtteranceDirectiveRecordsOutcomeWithoutExecution(t *testing.T) {

modules/interaction/domain/travel.go

@@ -148,6 +148,9 @@ func TravelSearchClarification(message string, history []interaction.HumanUttera
 func travelContextDestination(history []interaction.HumanUtterance) string {
 	for index := len(history) - 1; index >= 0; index-- {
 		tokens := semanticTokens(history[index].Content)
+		if !travelContextCue(tokens) {
+			continue
+		}
 		for tokenIndex, token := range tokens {
 			if token != "в" && token != "до" {
 				continue
@@ -160,6 +163,10 @@ func travelContextDestination(history []interaction.HumanUtterance) string {
 	return ""
 }
 
+func travelContextCue(tokens []string) bool {
+	return travelCue(tokens) || containsStemInTokens(tokens, "добрат", "передвиг", "ехать", "едем", "лететь", "поездк")
+}
+
 func capitalizeWord(value string) string {
 	runes := []rune(value)
 	if len(runes) == 0 {