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

Example Input: Sentence1: Thank you so much. That is all I will need today. Sentence2: Great, how many tickets would you like to purchase? Sentence3: That would be perfect! Sentence4: I am looking to go from cambridge, and go on friday arriving by 14:30 Sentence5: Okay, how about the TR5901 leaving at 13:34 and arriving at 14:24 with a duration of 50 minutes? The cost is 16.50 pounds. Would that work for you? Sentence6: There are 266 trains going to Peterborough. Can you give me a departure day and time so that I can narrow down your choices? Sentence7: Your tickets are all booked, reference number R5P65TW5 Sentence8: I'd like to find a train to peterborough. Sentence9: Thank you for contacting Cambridge TownInfo centre. Have a wonderful day! Sentence10: 7 tickets please. Can I also have the reference number for the booking? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Sure, i can help you with that. Where will you be departing from? Sentence2: Okay, and what is your destination? Sentence3: I want to leave from the train station. Sentence4: i want to book a taxi. Sentence5: Can you tell me what time you would like to leave? Sentence6: Got it, your booking has been completed! Look out for a blue tesla, contact number 07520411520. May I assist with anything else? Sentence7: I want to leave london kings cross train station after 02:00 Sentence8: I have booked you a white ford. The contact number is 07064257037 Sentence9: Oh, I'm sorry I need to get to gallery at twelve a high street. Sentence10: It's called gallery at twelve a high street. Sentence11: I'm sorry, I don't understand. What is the gallery name you want to travel too? Sentence12: Reservation reserved, let me know if you need any more assistance with anything else. Sentence13: Perfect!! Thank you for all your help. Sentence14: That will be all. Thank you. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, Scudamores Punting Co is located in Granta Place, Mill Lane and their phone number is 01223359750. Anything else you want to know? Sentence2: in order for me to get a cab for you I need the arrival and or departure times Sentence3: Okay! For when, and for how many people? Sentence4: Yes. I would like a taxi to take me from the attraction to the restaurant. Sentence5: Yeah, are there any expensive Chinese places in town? Sentence6: You're welcome. Have a great day. Sentence7: Perfect thats everything I needed thanks for the help Sentence8: I've booked a taxi for you. It's a blue Volvo and the contact number is 07079040787. Sentence9: I don't need a reservation at the moment but could you send me the postcode and address of the restaurant. Thank you. Sentence10: How about peking restaurant? Would you like to make a reservation? Sentence11: I need to get to the attraction by 22:15. Sentence12: that sounds great, please do Sentence13: I would like the south please. Sentence14: Is there an entrance fee? If so, what is it? Sentence15: Hi, I am looking for a particular attraction. Have you heard of Scudamores Punting Co? Sentence16: There are 9 expensive Chinese restaurants in town. Is there a particular area you would like to dine in? Sentence17: The address of the restaurant is 10 Homerton Street City Centre. The postcode is cb28nx. Can I assist with anything else? Sentence18: If they have an entrance fee, it's not showing up with their listing. Is there anything else I can do for you today? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System