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

Example Input: Sentence1: Howdy, I'm looking for a place to stay. I don't care about internet. Sentence2: I booked you at city centre north b and b. Your reference number is Y87Q565O . Do you need anything else? Sentence3: How about the worth house? It is a 4 star guesthouse and has free internet and free parking. Sentence4: You are so welcome. Enjoy your stay in Cambridge. Sentence5: Would you like me to book it for you? Sentence6: There are 33 hotels in Cambridge. What price range would you like, and what area? Sentence7: Yes and make it for Friday for 2 days, and 2 people. Sentence8: yes I like that one with the free wifi. Sentence9: I would like a cheap hotel in the north please. Sentence10: Thank you so much for your help. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I am sorry but you will have to get ticket there and here is the address 251a chesterton road. Sentence2: Do you want me to make a booking? Sentence3: I'm seeking an attraction! A boat one will be nice. Sentence4: Yes please! Thank you so much! Sentence5: Great! I have four for you. Two are in the centre. Any location you'd like in particular? Sentence6: Sure, I can get tickets for the cambridge punter in the city centre. If that sounds okay, what day and time would you like? Sentence7: I am also looking for the Oak Bistro, a place to eat. Sentence8: No, I'd like the name of one in the centre please. Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: How about the alexander bed and breakfast. And has free parking and free wifi. Sentence2: No, but I want free parking. Sentence3: That sounds fine. I'm also looking for something to do in the west part of town. Got any recommendations? Sentence4: I'm not ready to book just yet. Do any have internet? Sentence5: Clare Hall is located on Herschel Road and has the postcode CB39AL. Is there anything else I can help with? Sentence6: There are no 2 star hotels available. Sentence7: Great. I have 9 available that offer free parking. Is there a star rating you'd prefer? Sentence8: Hello, I'm looking for an inexpensive hotel to stay in while I'm in Cambridge. I would like it to be a guesthouse type of room please. Sentence9: No star rating. I just need it to be a guesthouse, cheap, free parking and if they have internet. Sentence10: we have lovely college's in the west, clare hall is one of my favorites! Sentence11: No, that is all I need today. Thank you so much. Sentence12: Ok, let's try Clare Hall. What's the address and postcode? Sentence13: Okay I'll need some more information to book that for you. How many people, for how long and when please? Sentence14: Thank you for contacting the Cambridge TownInfo centre. Goodbye Sentence15: I'd prefer one with at least a 2 star rating. I'd also like one with internet. Sentence16: I have several throughout the city. Is there any location you would prefer it in? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System