Dialogue 1: Offering help.

dr. Nahda: Hello .... 

Fafa: Hello, doctor.

dr. Nahda: You look terrible. What can I do for you?

Fafa: I can't go to school today.

dr. Nahda: Oh, I am sorry to hear that. What is the problem?

Fafa: My stomach hurts terribly. I think I have a fever as well.

dr. Nahda: Okay, let me check your stomach. (The doctor puts the stethoscope in Fafa's belly and strikes it lightly). Does it hurt here?

Fafa: No that one.

dr.Nahda: Here?

Fafa: Yes, that's really terrible.

dr. Nahda: Alright then, I will give you a prescription. You have to take the pills three times a day, okay.

Fafa: Okay, doctor.

dr. Nahda: Good. Get well soon, Fafa. Bye. 

Fafa: Thanks a lot. Bye, doctor.

Answer the following questions by using the information from the dialogue above! 

3. "What can I do for you?" is the expression that is used to ____