The question is different from other questions as the recruiter wants to test whether you are patient or not through this question. To respond to this question, you have to give an example from your working experience. Here’s a dummy situation.

I once had a patient who was refusing services and was constantly disturbing everybody else. He was not ready to undergo the treatment procedure set for him. At that time when no other assistant was able to tackle the situation, I somehow managed to persuade him to continue with the therapy and treatments set out for him.