Here you define which and how much personal information you want to have from your customer. First you have to decide the following:
- Personalisation for all = you need the information from every single person who books your service.
- contact person only = you are fine with having information from one person in the group/family.
- no personalisation = you do not need any personal information, it is enough for you to know how many tickets are booked.
In the second step, you define what information you need from your guests: name, language, date of birth, gender, phone number, address, etc.
Do not ask your customers for unnecessary personal data. In the case of a guided tour, however, the question about language can be quite relevant.