Read the dialogue below and answer the question!

Marini: Hi, Doc!

Doctor: Hi, Marini! How can I help you?

Marini: I think I have an oily skin and there're always small bumps here and there on my face. How can I get rid of them? They're really irritating!

Doctor: Well, I would suggest that you wash your face often. You should rinse your face with lukewarm water every night and pat it dry with a clean towel. Make sure you don't rub it dry. Then, apply this cream to your face.

Marini: Oh, this cream?

Doctor: Yeah. It's pretty effective in wiping out pore clogging dirt and oil. It rids dead cells and helps stimulate the blood circulation of your face.

Marini: Wow!

Doctor: Oh, just use a small amount on the oily areas. Also, don't rub it hard. Just dab it lightly.

Marini: I'll keep that in mind!

Doctor: Of course. Also, I suggest you to get facial every four to six weeks for a deep cleaning.

Marini: Thanks, Doc.

Who are the participants in the dialogue?