Woocommerce Time-Slots for free service calls

Hi,

is it possible to offer time slots for a service with woocommerce?
But not like “12:00 – 13:00” but “20 Minutes”, “40 Minutes”

Short explanation: Customers of a company can book service calls as a free offer.

1. offers: Service call topic 1 (duration 10 minutes), Service call topic 2 (duration 15 minutes), etc. The user can select multiple services, up to a maximum of 30 Minutes.

2. free dates: The user can see in a calendar when the booked services are available.

3. check-out: the user puts the different time slots in the shopping cart without paying anything (customer wants a shopping cart function).

Thanks a lot and kind regards

Simon