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

Ex Input:
Sentence1: I'm sorry, but we just reserved your table. There is no car type. But since you ask, did you need a taxi? Sentence2: Thanks, that's all I need today. Goodbye! Sentence3: Could i please get the phone number and address? Sentence4: good day and thanks for using our services Sentence5: I only have one restaurant in the north for European food, but they have amazing food. It's called City Stop Restaurant. They are expensive but so worth it! Sentence6: book a table for 2 people at 13:15 on tuesday. Sentence7: I would like the north please. Sentence8: I am thinking I would like to try some european food while I am in town. Sentence9: Yes I need a taxi that will take me between the two places and need to arrive by 13:15. Sentence10: Okay. I have a taxi booked. It will be a yellow bmw and the contact number is 07135918917 Sentence11: The Botanical Gardens at Cambridge University are a favorite destination. The entrance fee is only 4 pounds. Sentence12: What is the car type, please thank you Sentence13: There are several to choose from, in which part of town would you like to concentrate? Sentence14: Sure, the phone number is 01223336265. The address is bateman street. Can I do anything else for you? Sentence15: Yes, I would like the information on parks that are located in the centre please. Sentence16: Your booking was successful! The table will be reserved for 15 minutes. Reference number is : ZLRYLH3O . Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I am interested in finding a great nightclub to take a friend to. Sentence2: I've booked a table for 5 on Monday at 17:30. The reference number is MUBJSMLX . Is there anything else I can help you with? Sentence3: I have found 4 restaurants. Do you have a preference of area? If not that Kohinoor in the centre is very popular. Sentence4: Great that was all that I needed today, thank you. Sentence5: Cambridge has lots of great options. Club Salsa is quite popular and is in the centre. Sentence6: I have arranged for a black Honda to have you arrive at Kohinoor by 17:30. The contact number for the Taxi is 07997403672. Is there something else I can assist with? Sentence7: That sounds great. How much is the entrance fee? Sentence8: Perfect, can you also help me find a place to eat that is cheap and serves Indian food? We are looking to accommodate 5 people at 17:30 on Monday. Sentence9: Just book it on Monday please, for 5 at 17:30. Sentence10: Perhaps their phone number? Sentence11: The phone number is 07782218745. Sentence12: The Club Salsa entry fee is 5 pounds. Can I help with anything else? Sentence13: You're welcome! Have a good day. Sentence14: We need a taxi from Club Salsa that will get us to Kohinoor in time to eat. Can you make that happen? Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Yes, it is. It's located on 154 chesterton road, cb41da. Would you like a room? Sentence2: I would like to leave after 15:15 on Thursday. Sentence3: Have a nice day, goodbye! Sentence4: We have a train departing Cambridge at 15:50, arriving at Ely at 16:07. Would you like me to book a reservation? Sentence5: They do indeed provide complimentary Internet access. Would you like to make a reservation? Sentence6: Your booking was successful. The total fee is 8.8 GBP payable at the station. Your reference number is H0BMD920 . Sentence7: Just one more question: Is it in the moderate prince range? If so, please give me their address. If not, I need something moderately priced. Sentence8: Yes that works great. Can you book 2 tickets for that train and give me the reference number? Sentence9: Great. That's all I needed. Thank you. Sentence10: No thanks. Not at this time. I would appreciate some help finding a train to get me to Ely though. Sentence11: Does that include free wifi? Sentence12: Can you tell me where you will be leaving from and on what day and time? Sentence13: I like acorn guest house. Need me to book a room? Sentence14: I am looking for a hotel to stay in with a 4 star rating that is in a guesthouse style. Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User