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: I have booked you at the stazione restaurant and coffee bar for tuesday. Your reference number is VBMXDETF . Sentence2: Yes, there are 9! Do you have a preference on pricerange? Sentence3: Thanks for using the Cambridge TownInfo Centre. Goodbye! Sentence4: Get me on one that leaves after 14:30 Sentence5: I have train TR8932 that leaves at 15:11 and arrives by 15:58. Would that work for you? Sentence6: book for 3 people. also find me a restaurant in the central that serves traditional food Sentence7: That's all I needed today. Thank you! Bye! Sentence8: I need a train leaving from Kings Lynn on Tuesday. Sentence9: No I am sorry no mexican restaurants in that area. Another perhaps? Sentence10: Yes, I am looking for a restaurant in the centre that serves traditional food. Sentence11: Tuesday, 3 people, 18:45pm, italian, not mexican, please book and give me a name and confirmation number. Sentence12: The booking number is 1MNBDNEH . Did you need to know anything else on the train? Sentence13: No. I don't. Can I book a table for the same 3 people at 18:45? Sentence14: I am going to Cambridge. Sentence15: We don't have anything like that in the centre. How about a different area or food type. Sentence16: There are no Mexican restaurants in that area. Sentence17: Great! Thanks for all your help! Sentence18: I like italian also. Are there any in that area? Sentence19: How about Italian food? Sentence20: Is there anything else I can assist you with today? Sentence21: What day would you like that reservation? Sentence22: We have 19 trains that day starting at 05:11 and going every hour, any time preference? Sentence23: There are several trains leaving Kings Lynn on Tuesday. Where is your destination going to be? Sentence24: I would like a mexican food restaurant nearby also. Question: Who has spoken the sentence 7? (A) User (B) System
Solution:
Answer: (B) System