Here are the matches between the questions in column A and the responses in column B:

1. What is your favourite dish? → C. it's beef noodle soup
2. Does she like fried fish? → B. no, I like fruit juice
3. How much is a can of watermelon juice? → E. it's 20000dong
4. Is milk your favourite drink? → A. not much
5. What dishes does your father cook? → F. instant noodles and omelette
6. Do you often go to that restaurant? → D. yes, we go there twice a month

So the matched responses are:
1. C
2. B
3. E
4. A
5. F
6. D