Update langgraph_code.py

langgraph_code.py

@@ -6,7 +6,6 @@ from typing import TypedDict, Annotated, Sequence, Literal
 from rapidfuzz import process
 from langchain_core.messages import BaseMessage, HumanMessage, AIMessage, SystemMessage
 from langchain_openai import ChatOpenAI
-from langchain_google_genai import ChatGoogleGenerativeAI
 from langgraph.graph import StateGraph, END
 from langgraph.prebuilt import ToolNode
 from langchain_core.messages import messages_to_dict
@@ -22,7 +21,7 @@ load_dotenv()
 DB_PATH = "movie_booking_details.db"
 
 # Initialize LLM
-llm = ChatGoogleGenerativeAI(model="gemini-2.5-flash",temperature=0)
+llm = ChatOpenAI(model="gpt-4o-mini",temperature=0)
 
 # ============================================================================
 # State Definition