Describe the flow of function calling: the user asks 'What's the weather in Moscow?' — what happens under the hood?

When a user asks "What is the weather in Moscow?" in a system with flow function calling, the following process occurs:

1. Recognition and analysis of the request: The system receives the request text and determines that the user wants to get weather information for a specific city — Moscow.

2. Determining the required function: Based on the analysis of the request, the system selects a function responsible for obtaining weather data. This could be a call to an external weather service API.

3. Calling the function with parameters: The system calls the function, passing the parameter — the city "Moscow".

4. Processing the result: The function requests current weather data and returns it to the system.

5. Forming a response: The system forms a response to the user based on the received data, for example: "In Moscow now +5°C, cloudy".

Example in Node.js using a hypothetical weather retrieval function:

async function getWeather(city) {
  // Call to external weather API
  const response = await fetch(`https://api.weather.com/v1/${city}`);
  const data = await response.json();
  return `In ${city} now ${data.temperature}°C, ${data.condition}`;
}

async function handleUserQuery(query) {
  if (query.includes('weather')) {
    const city = 'Moscow'; // extracted from the query
    const weatherInfo = await getWeather(city);
    return weatherInfo;
  }
  return 'Cannot process the request';
}

Thus, flow function calling is a mechanism that links understanding the request with calling the appropriate functions to obtain and return the needed information.