Making friends
If you add people from the forum you will be able to book their shops and they yours.
As a tip I will say that I will not book anyone who 1. Has no farms. 2. Has nothing planted. Or 3. Has dead crops.
I have a pet peeve with people who stop playing and don't delete their shops. Many of us go in and book their shops and waist our time only to get the failed to deliver message a day later.