contoh percakapan bahasa inggris tentang expressing and responding to doubt certainty and uncertainty

1: How Are U?
2: Im Fine Thank you.
1: What are u doing?
2: Im in a doubt.
1: what is it about?
2: I doubt that i will get A good grade in the exam
1: Why you doubt about it?
2: Im not confident about my studying.
1: I See. but dont worry about it, i trust you.
2: Are u certain about it?
1: Im Certain.