Grafana service port forwarding not working

[shreyasarani23]

when I do port forward of grafana service in AKS cluster using the below command
shreyas@Azure:~/kafka-deployment$ kubectl port-forward grafana-f5797fcc9-668c2 3000:3000 -n monitoring
Forwarding from 127.0.0.1:3000 -> 3000
But when I do http://localhost:3000 grafana page is not showing in my web browser
By the way I didn't deploy alert manager
I have deployed prometheus resources and grafana

shreyas@Azure:~$ kubectl get pods -n monitoring
NAME READY STATUS RESTARTS AGE
grafana-f5797fcc9-668c2 1/1 Running 0 46m
prometheus-operator-7f96c5b87f-l5wln 1/1 Running 0 3h1m

why my localhost:3000 is not working any idea??
please help