Update billing.py

billing.py

@@ -18,7 +18,9 @@ def fetch_billing(patient_id, data):
     total_cost = patient_data["total_cost"]
 
     billing_info = (
+        f"Patient ID: {patient_id}\n"
         f"Patient: {patient_data['name']}\n"
+        f"Phone Number: {patient_data['phone']}\n"
         f"Tests:\n{test_list}\n"
         f"Total Bill: ₹{total_cost}"
     )