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

Ex Input:
Sentence1: Thanh binh is a nice restaurant that serves Vietnamese food and is in the cheap price range. Sentence2: That sounds great! May I have their phone number please? Sentence3: Thank you for using the Cambridge restaurant system, please call again. Sentence4: Okay, thank you for your help! Sentence5: How about vietnamese food, please? Sentence6: I am looking for a restaurant that serves Malaysian food and is in the cheap price range. Sentence7: thanh binh's phone number is 01223 362456 Sentence8: No matches found for cheap Malaysian food. Would you like something else? Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I'm sorry. I changed my mind. I don't want a guesthouse. Are there any hotels with 2 stars? Sentence2: Great that was all I needed today, thank you. Sentence3: Is there a particular area you would like to stay in? Sentence4: There isn't a guesthouse with 2 stars and free internet available. Is there another type of hotel I can look up for you? Sentence5: Great Glad I could be of help to you. Sentence6: I have you booked in the Ashley hotel. Your reference number is CW6YMT0B . Is there anything else I can do for you today? Sentence7: No, just any 2-star hotel with free wifi will do. Sentence8: Hi, I need a guest house please. Sentence9: Do you have a specific location you want to be? Sentence10: No, but I need free wifi and I would like a 2 star guesthouse please. Sentence11: I have 3 guesthouses all in the moderate price range. Would you like me to choose one for you? Sentence12: I found 3 for you all in the expensive price range. Can you please give me the details so that I may book it for you? Sentence13: Yes, how about a guesthouse with 3 stars and free wifi instead? Sentence14: I would like it for 6 people for 2 nights starting on Wednesday. Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Sure. The postcode is cb43ht. Can I help you with anything else today? Sentence2: Royal Spice sounds good. Can you reserve a table for 2 at 17:45 on Sunday? Sentence3: I have found the City Centre North B and B guesthouse. It is cheap and has 0 stars. Sentence4: Sure reference number is CH9ZLEFO Sentence5: The taxi booking has been completed! Look out for a yellow bmw the contact number is 07132659323. Anything else I can assist with today? Sentence6: Let's find me a cheap eatery in the north part of the town. Thank you. Sentence7: Can you tell me the postcode? Sentence8: Great. Thanks for talking to us! Sentence9: I want somewhere with 0 stars and free wifi that is cheap and in the north, just like my restaurant Sentence10: I'm going to need a taxi also. Sentence11: Could you tell me what area you would like to stay in, and if you require parking or wifi? Sentence12: The hotel to the restaurant.... Sentence13: Okay, please tell me where you will depart from, your destination, and a time that you either wish to leave or arrive by Sentence14: There are 2 places in the north that are in the cheap price range. Royal Spice which serves Indian food and Da Vinci Pizzeria. Do either sound good to you? Sentence15: That does it for now, thank you. Sentence16: I also need a place to stay Question: Who has spoken the sentence 12? (A) User (B) System

Ex Output:
Answer: (A) User