Dialogflow Restaurant Chatbot Tutorial | 5 (https://chatbotslife.com/dialogflow-restaurant-bot-tutorial-5-47b8a3d9a30c)

createBooking.js

 function createBooking(agent) {
    let guests = agent.parameters.guests;
    let time = new Date(agent.parameters.time);
    let date = new Date(agent.parameters.date);
    let bookingDate = new Date(date);
    bookingDate.setHours(time.getHours());
    bookingDate.setMinutes(time.getMinutes());
    let now = new Date();
        
    if (guests < 1){
        agent.add('You need to reserve a table for at least one person. Please try again!');
    } else if (bookingDate < now){
        agent.add(`You can't make a reservation in the past. Please try again!`);
    } else if (bookingDate.getFullYear() > now.getFullYear()) {
        agent.add(`You can't make a reservation for ${bookingDate.getFullYear()} yet. Please choose a date in ${now.getFullYear()}.`);
    } else {
        let timezone = parseInt(agent.parameters.time.toString().slice(19,22));
        bookingDate.setHours(bookingDate.getHours() + timezone);
        agent.add(`You have successfully booked a table for ${guests} guests on ${bookingDate.toString().slice(0,21)}`);
        agent.add('See you at the restaurant!');
        agent.add('Have a wonderful day!');
    }
 }