Simplified Hotel Booking Chatbot

Objective

Developed a RESTful API using Express.js that implements a chatbot capable of handling hotel booking queries. The chatbot uses Gemini-1.5-Flash for natural language processing and maintains conversation history.

Here's the link of the hosted project (AWS + Render): Simplified Hotel Booking Chatbot

Technical Requirements

• Used Express.js as the framework for building the API.
• Integrated Gemini-1.5-Flash for natural language processing.
• Implemented conversation history storage using sqlite and sequelize.
• Implemented function calling to get rooms data & simulate booking a room.

Main Endpoint

• POST /chat - Handles user messages and returns chatbot responses.

Chatbot Flow

1. User initiates a conversation about booking a resort room.
2. Bot fetches room options from an API and responds with a list of room options.
3. User selects a room.
4. Bot provides pricing information.
5. User confirms they want to proceed with booking.
6. Bot makes a simulated API call to book the room and returns a booking confirmation with a booking ID.

Skills Demonstrated

• Creating a RESTful API with Express.js.
• Integrating and using Gemini-1.5-Flash for natural language processing.
• Maintaining conversation history throughout the chat session.
• Implementing function calling to simulate external API interactions (room booking).

Bonus Features

• Implemented basic error handling for invalid user inputs or API failures.
• Added a simple frontend interface for interacting with the chatbot (using HTML, CSS, and JavaScript or React).

Setup Instructions

Prerequisites

• Node.js (>=18.x)
• npm

Installation

1. Clone the repository:

   git clone <repository-url>
   cd <repository-directory>

2. Install the dependencies:

   npm install

3. Create a .env file in the root directory and add your Gemini-1.5-Flash API key:

   GEMINI_API_KEY=your_gemini_api_key
   

Running the Project

1. Start the server:

   npm start

2. The API will be accessible at http://localhost:3000.

Example API Requests and Responses

POST /chat

Request:

{
  "message": "I want to book a resort room."
}

Response:

{
  "response": "Sure! Here are some room options...",
  "rooms": [
    {
      "id": 1,
      "type": "Deluxe Room",
      "price": "$200/night"
    },
    {
      "id": 2,
      "type": "Suite",
      "price": "$350/night"
    }
  ]
}

API Key Setup

To set up the Gemini-1.5-Flash API key:

1. Sign up on the Gemini platform and obtain your API key.
2. Add the key to your .env file as shown above.