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

Example Input: Sentence1: Taj Tandoori is an expensive Indian restaurant in the South. Would you like more information on them? Sentence2: I'm looking for an expensive restaurant in the south part of town Sentence3: Thanks for your call. Goodbye! Sentence4: Thank you goodbye. Sentence5: May I have their address and phone number? Sentence6: chiquito restaurant bar is located at 2G Cambridge leisure park cherry hinton road cherry hinton. Its phone number is 01223400170. Would you like anything else? Sentence7: Yes. chiquito restaurant bar serves mexican food in the expensive price range and is located in the south part of town. Sentence8: Is there anything else? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: No thank you. That is great. Sentence2: Have a good day! Sentence3: There are three british restaurants in the west. What price range are you considering? Sentence4: Thanks! Sentence5: I'm looking for meals under 30$ a person. I need to book for 3 at 16:15 on Wednesday. Sentence6: The restaurant Saint Johns Chop House is the only restaurant to your specifications with a moderate pricing. Would you like me to make a reservation? Sentence7: Your booking is successful and your reference number is CZT3LA0M . Is there anything else I can help you with? Sentence8: Yes please and I will need a reference number. Sentence9: I am looking for a German restaurant in the west. Sentence10: Enjoy your time! Sentence11: There are no German restaurants available in the west. Would you like to try a different area or different food type? Sentence12: How about one that serves british food instead? Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You're very welcome! Can I help you with anything else? Sentence2: I was able to book the taxi arriving at nandos by 14:30. It will be a yellow ford and the contact number is 07126119012. Sentence3: Great! Thank you so much! Sentence4: If you are looking for an inexpensive restaurant in the south there is a Chinese one and a Portuguese as well. Do you have a preference for price or style? Sentence5: Yes, I would also like free parking and prefer a guesthouse. Sentence6: There is only Chinese or Portuguese available Sentence7: I found Rosa's Bed and Breakfast matching your request. Would you like me to book that for you now? Sentence8: book it for the same number of people at 14:30 on the same day Sentence9: Nandos is booked with the reference number 38RU5UDA .The table will be reserved for 15 minutes. May I help with something else? Sentence10: The restaurant is Nandos. I think you'll really like it. It's cheap and in the south area of town at Cambridge Leisure Park Clifton Way, post code cb17dy. Sentence11: No that is it. Thank you. Sentence12: Yes please. Book it for 4 nights for 8 people starting this Friday Sentence13: I was also hoping to find a restaurant in the same part of town as the hotel. Sentence14: Greetings, I'm looking for a hotel to stay at on the southend. Sentence15: Yes, I need a taxi to the restaurant, I want to get there by the booking time. Nice car, no clunker please. Sentence16: I have one listing for rosa's bed and breakfast, would you like other information or like me to make a booking? Sentence17: You are welcome, enjoy your day. Sentence18: I would like it to be cheap. Sentence19: The restaurant should be in the same price range as the hotel and I would like a restaurant that serves barbeque food Sentence20: Tell me about the Portuguese restaurant Sentence21: I have reserved your room. The reference number is 0L7YKIHN . Can i do anything else for you today? Sentence22: Do you have a price range? Question: Who has spoken the sentence 15? (A) User (B) System
Example Output:
Answer: (B) System