Teacher: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Solution: Answer: (A) User
Reason: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

Now, solve this instance: Sentence1: There are no Irish restaurants in the cheap price range. Would you like something else? Sentence2: I am looking for Irish food that is cheap. I will need their phone number too. Sentence3: How about Vietnamese food? Sentence4: The only restaurant meeting your criteria is Thanh Binh in the west. Their phone number is 01223 362456. Question: Who has spoken the sentence 3? (A) User (B) System
Student:
Answer: (B) System