app.py

from langchain_openai import ChatOpenAI
from langchain_core.prompts import ChatPromptTemplate
import streamlit as st
import os

openai_api_k = os.getenv("openai_api")

llm = ChatOpenAI(temperature=0, model="gpt-3.5-turbo",openai_api_key=openai_api_k,max_tokens=150)
prompt = ChatPromptTemplate.from_messages([
    ("system", "You are a helpful assistant that gives a reply email for a particular email"),
    ("human", "{input}")
])



# Streamlit interface
st.title("Email Reply Generator")
st.write("Enter the email text you want a reply for:")

# User input
user_input = st.text_area("Email Text")

# Generate and display the response
if st.button("Generate Reply"):
    chain = prompt | llm
    response = chain.invoke({"input": user_input})
    st.write("Generated Reply:")
    st.write(response.content)