Introduction: This project is a RESTful API built using Express.js that implements a chatbot capable of handling hotel booking queries. The chatbot uses OpenAI's API for natural language processing and maintains conversation history using SQLite and Sequelize.

Setup Instructions

Clone the repository:

git clone https://github.com/your-username/hotel-booking-chatbot.git

Install dependencies: cd hotel-booking-chatbot npm install

Set up the OpenAI API key: Create an account on the OpenAI platform if you haven't already. Navigate to the API keys page and click on "Create new secret key". Optionally, provide a name for the key and click "Create secret key". Create a .env file in the project root directory and add the following line, replacing YOUR_OPENAI_API_KEY with the secret key you just generated: OPENAI_API_KEY=YOUR_OPENAI_API_KEY

Set up email credentials (optional): If you want to send booking confirmation emails, you'll need to provide your email credentials. In the .env file, add the following lines, replacing YOUR_EMAIL_USER and YOUR_EMAIL_PASSWORD with your email credentials: EMAIL_USER=YOUR_EMAIL_USER EMAIL_PASSWORD=YOUR_EMAIL_PASSWORD

Start the server: npm start

The server will start running on http://localhost:3000. Example API Requests and Responses List Hotel Room Options Request: curl -X GET http://localhost:3000/rooms

Response: json [ { "id": 1, "name": "Standard Room", "price": 100 }, { "id": 2, "name": "Deluxe Room", "price": 150 }, { "id": 3, "name": "Suite", "price": 200 } ]

Create a Booking Request: curl -X POST http://localhost:3000/book
-H "Content-Type: application/json"
-d '{ "roomId": 2, "fullName": "John Doe", "email": "[email protected]", "nights": 3 }'

Response: json { "id": 1, "roomId": 2, "name": "Deluxe Room", "price": 150, "nights": 3, "total": 450 }

Chat with the Chatbot Request: curl -X POST http://localhost:3000/chat
-H "Content-Type: application/json"
-d '{ "userId": "user123", "message": "I'd like to book a room at your hotel" }'

Response: json { "response": "Hello! I'd be happy to help you book a room. What dates are you looking to stay?" }

Subsequent request: curl -X POST http://localhost:3000/chat
-H "Content-Type: application/json"
-d '{ "userId": "user123", "message": "I'd like to stay for 3 nights starting on July 1st" }'

Response: json { "response": "Great, let me check our available rooms for those dates. Here are the options:\n\n[Room Options]\n\nDo any of those work for you? Let me know which room you'd like to book." }

Subsequent request: curl -X POST http://localhost:3000/chat
-H "Content-Type: application/json"
-d '{ "userId": "user123", "message": "I'd like to book the Deluxe Room" }'

Response: json { "response": "Okay, the Deluxe Room is $150 per night for 3 nights, so the total cost will be $450. Does this work for you? If so, I can go ahead and book the room." }

Subsequent request: curl -X POST http://localhost:3000/chat
-H "Content-Type: application/json"
-d '{ "userId": "user123", "message": "Yes, please book the Deluxe Room" }'

Response: json { "response": "Great, I've booked the Deluxe Room for you. Here are the details:\n\nRoom: Deluxe Room\nNights: 3\nTotal Cost: $450\nBooking ID: 123456\n\nI've also sent a confirmation email to [email protected]. Let me know if you need anything else!" }