You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Why? The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input: Sentence1: Are they all listed as expensive? Sentence2: Could you please give me the phone number for the Royal Standard? Sentence3: I was really hoping for Sri Lankan. Sentence4: Sure, it's 01223247877. Sentence5: I'm sorry but I have nothing listed. Is there another type of food you might be interested in? Sentence6: I am looking for a restaurant in the expensive price range. It should serve Sri Lankan food. Sentence7: I found three located in the centre and one on the east. Which would you prefer? Sentence8: Okay, thanks. That will do it for today. Sentence9: Yes, they are all expensive. backstreet bistro is in the centre area, and royal standard is in the east. Would you like me to make a reservation at either of these? Sentence10: I'm afraid there aren't any Sri Lankan restaurants in town at all. Is there something else I can search for you? Sentence11: You are most welcome. Thank you for calling Cambridge TownInfo Centre. Goodbye. Sentence12: How about gastropub? Question: Who has spoken the sentence 7? (A) User (B) System
Solution:
Answer: (B) System