Bookings create, is this solution good?

Hello, I am creating a booking application for businesses and now I am creating the booking time slots.

Example. A business (user) logs in to the app and creates available times for a specific service. The form looks like this and lets say the user types in the following inputs:

1. Choose Service: Bowling  
2. Choose time: 10:00 and 12:00  
3. Booking avaiable online: Yes // or No

Note: Bowling has a duration of 60 minutes (this is added before)

Now, when the user clicks on save this function is triggered (see below)

public function createBookings(Request $request)
    {

        $start_time = now()->addHours(rand(1,100));
        $six_digit_random_number = mt_rand(100000, 999999);

        $booking = new Booking();
        $booking->business_id = 1;
        $booking->service_id = $request->service_id;
        $booking->employee_id = 1;
        $booking->customer_id = null;
        $booking->start_time = $start_time->format('Y-m-d H') . ':00';
        $booking->end_time = $start_time->addMinutes(rand(45, 46))->format('Y-m-d H') . ':00';
        $booking->booking_number = $six_digit_random_number;
        $booking->comment = null;
        $booking->status = 0;
        $booking->save();

        return response()->json();
    }

Just testing this out so some values are not dynamic.

My solution now is that if the user chooses the time 10:00 and 12:00 (as the example above) I am going to create in the table bookings 2 months of available bookings for each day and for the time. So after the function is called it will generate 60 different days for each booking time 10:00 and 12:00

For example in the bookings table:

id | "foreign keys" | start_time | end_time | booking_number | comment | status  
1  | "foreign_keys" | 2021-03-31 10:00 | 2021-03-31 11:00 | 100000 | null | 0  
2  | "foreign_keys" | 2021-04-01 10:00 | 2021-04-01 11:00 | 100001 | null | 0  
...  
60  | "foreign_keys" | 2021-05-30 10:00 | 2021-05-30 11:00 | 100060 | null | 0  <--- now created 60 days for time *10:00* with a duration of 60 minutes  
61  | "foreign_keys" | 2021-03-31 12:00 | 2021-03-31 13:00 | 100061| null | 0  
62  | "foreign_keys" | 2021-04-01 12:00 | 2021-04-01 13:00 | 100062 | null | 0  
...  
120  | "foreign_keys" | 2021-05-30 12:00 | 2021-05-30 13:00 | 100120 | null | 0  <--- now created 60 days for time *12:00* with duration of 60 minutes
 

* "foreign_keys" are business_id service_id employee_id customer_id, to lazy to write all of them

So for the question, is this solution good? Or is there anything else I can do? If anyone could give me some input that would be great.