Question 89 - 91 refer to following paragraph:

M: Hi, this is Frank Walton from Human Resources. (89) We need to post an ad this week for a new dental assistant. A colleague told me you are really good at making job application ads. (90) Have you seen the criteria for dental assistant position? This is my first time recruiting new staff, so I’m a little unfamiliar with some of the questions. (91) I would really appreciate it if you could come by my office today and teach me the criteria. Thanks.

89. What position is being advertised?