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: No, what type of cheap restaurants are there? Sentence2: I prefer the portuguese restaurant. Sentence3: Nandos is a very popular restaurant serving portuguese food in the south area of town in the cheap price range. Would you like more information or to book? Sentence4: Reference number is : 8T2T8N3Q . Sentence5: If that doesn't work, please try for Sunday. Sentence6: Rosa's Bed and Breakfast is a cheap 4 star guesthouse in the South area of town. Would you like any more information? Sentence7: Can you book for the same group of people at 12:00 the same day? Sentence8: You're welcome, have a great day! Sentence9: Let me look and see if I can find you a room for three people for three nights starting on Thursday. Sentence10: i'm looking for rosa's bed and breakfast Sentence11: No, that's great, thank you. Could you reserve rooms there for 3 people for 3 nights starting Thursday? Sentence12: Thank you! What is the reference number please? Sentence13: No I am sorry there no Scottish restaurants available in the South. Would like to try another area? Sentence14: You are all booked. Reference number is 69V5E4KX . Sentence15: Are you aware of any Scottish restaurants in the south? Sentence16: In the south there are 2 cheap restaurants. One is Chinese and the othe is Portuguese. Sentence17: Thank you. That is all for today. Sentence18: You're all booked. Your table will be reserved for 15 minutes. Question: Who has spoken the sentence 12? (A) User (B) System
Solution:
Answer: (A) User