Complete the dialogue with proper words or sentences.

A: What do you want to be after graduation?

B:.

A: A doctor?.

B: Because it's interesting and useful.

A: Do you think it is easy to help other people?

B: No,. It's hard work and there are a lot of things to learn.

A: ?

B: My mother works in the hospital. And she works very hard.

A: Are you sure you can be a good doctor?

B: Yes, I'm quite sure. I'll go to college and try my best to learn a lot about medicine. I'll help others in trouble.

A: You are great. Keep trying! I think you will be a good doctor.

B:.