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

Example Input: Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: It looks like there are hourly trains starting at 5:09. Did you have a particular day and time in mind? Sentence2: Thanks for the help. Sentence3: Will you train arriving at 07:54 work ok for you? Sentence4: Yes I need it booked for 2 people please. Sentence5: Unfortunately, there are no other Italian restaurants in the east. Would you like me to find you one in another area? Sentence6: Is the pizza hut in the moderate price range? Sentence7: I've successfully booked 2 tickets for you, the reference number is 9FE8N16G . Sentence8: I am looking for an Italian restaurant in the east. Sentence9: Pizza hut fen ditton matches your description. Sentence10: I guess it'll have to do. Can you book us a table for 2 on Wednesday at 14:00 please? Sentence11: Uh, no pizza hut's please. Something more classy please. Sentence12: Absolutely! To start, let me get more details. What are your desired departure and arrival cities? Sentence13: Thanks so much! Can you help me with train tickets too? Sentence14: Yes, it is. Should I book it for you? Sentence15: Yes, I'd like to book the train for Wednesday and I want to arrive in Cambridge by 08:30. Sentence16: Booking was successful. The table will be reserved for 15 minutes.Reference number is : H4BTTI6P . Sentence17: The train should go to cambridge and should depart from leicester. Sentence18: Have a great day! Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Nope, that's all for me. Thanks for your help. Goodbye! Sentence2: I have successfully booked that for you. Your reference number is 6NUU0T68 . Is there anything else I can help you with today? Sentence3: Yes, please. In the same price range, if possible. Sentence4: I am looking for a hotel that include free parking and has a 1 star rating. Sentence5: I'm sorry, there are no hotels or guest houses matching that criteria. Sentence6: How many people are you wanting to book the hotel for? Sentence7: There are no cottages. Sentence8: Could find one in a moderate or cheap price range? Sentence9: Yes can you find guesthouses meeting that criteria? Sentence10: for 8 people. Starting from Sunday for 4 nights, please. Sentence11: Could you please try guesthouse, with free parking and a 4 star then? Sentence12: Sure, there are a few. Can I book you a room at one of them? How about The Acorn Guest House? Sentence13: I have the arbury lodge guesthouse in the same area and price range,would you like me to book that one? Sentence14: Yes go ahead and try that please. Sentence15: You're welcome, have a great day! Sentence16: Can you locate a cottage that offers what i am looking for. Sentence17: There are no hotels that meet that criteria. Would you like me to expand the search a bit? Sentence18: I have 16 entries matching that criteria. What part of town and price range would you prefer? Sentence19: Yes please try to book that for me thank you. Sentence20: The booking for the Acorn Guest House was unsuccessful. Would you like me to look for another hotel for you? Question: Who has spoken the sentence 8? (A) User (B) System
Example Output:
Answer: (A) User