You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Let me give you an 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
The answer to this example can be: Answer: (A) User
Here is 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

OK. solve this:
Sentence1: 4 stars, please, but still just moderately priced. Sentence2: One with free parking would be great! Sentence3: Thank you. Can you tell me if there is a train going to Norwich on Friday? Sentence4: My apologies, the train ID is actually TR4886, it costs 17.60 pounds per ticket and is a 79 minute trip. The train arrives at 21:55. Sentence5: I found 11 guesthouses matching your preferences. Do you have a star rating you'd prefer? Sentence6: You are welcome, what else can I do for you today? Sentence7: I have 19 trains departing for Norwich on Friday. Do you have a preferred departure time? Sentence8: I have 7 guesthouses that fit your needs. Do you have any other preferences? Sentence9: Hi, I am looking for a guesthouse to stay on the north side of Cambridge. Sentence10: Yes, after 19:45 and departing from cambridge please. Sentence11: Okay, thank you for your help! Sentence12: Great can I get the address of one and whether or not they have free parking? Sentence13: Okay, the TR4885 train leaves at 20:36 and arrives by 21:55. Would that work for you? Sentence14: Nope, that's everything. You've been very helpful. Sentence15: Yes, I think that will work. Can you tell me the price, travel time and confirm the arrival time please? Sentence16: There are 6 guesthouses that match your criteria. If you give me your length of stay and beginning date perhaps I can narrow them down for you. Sentence17: Thank you very much! I am glad i was able to you find everything you needed. Have a wonderful day and I hope you'll use our service again. Sentence18: Arbury Lodge at 82 Arbury Road has free parking. Question: Who has spoken the sentence 11? (A) User (B) System
Answer:
Answer: (B) System