Open Bookings, then Opening hours and services.
A service is one thing a customer can ask for: a blood test, a site visit, a profile evaluation, a full service, a cut and colour. Each one has a name, how long it takes, and what it costs.
Why the duration matters
It is how the diary works out what to offer. A 20-minute service and a 90-minute one cannot be offered the same slots, and if every service says 30 minutes the assistant will promise times you cannot keep.
Prices
Put in what you actually charge. If a price genuinely depends — a quote after inspection, a package that varies — say so in the service rather than inventing a number, and the assistant will say the same and offer to have someone call.
Never list a price you are not willing to honour on WhatsApp. A customer who is quoted ₹800 and charged ₹1,200 at the counter remembers the chat.
What customers can book
Not everything you offer needs to be bookable. Mark the ones the assistant may put in the diary itself; leave the rest as things it can describe and then hand over. A first consultation is usually safe to book. A procedure that needs a decision usually is not.
Keep it short
Six to ten services is easier for a customer to choose from than thirty. Group the small variations into one and let the conversation sort out the detail.