A typical situation in a pharmacy where a pharmacist greets a customer and enquires (asks) about a medical problem.
Note that (“See how”) the pharmacist starts by asking:
"Good afternoon. Can I help you?" This is the most usual way of starting contact with a customer in any type of situation. The word 'How' can be added before the word 'Can' to similar effect, ie: "How can I help you?".
See how the pharmacist starts different types of questions:
Can...? What...? When...? Do...? Have...? How often...?
The pharmacist asks "How often do you have to go?" This refers to how often the customer needs to go to the toilet.
