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

Example Input: Sentence1: 5 nights, please. Sentence2: Sure. Please book five tickets for me and reply with the reference number. Sentence3: It's booked and your reference number is LFE8G8CE . The address is 154 chesterton road and postcode is cb41da. Anything else I can do for you? Sentence4: Where will you be departing from? Sentence5: Enjoy your visit. Please give us a call if you need further assistance. Sentence6: 5 people starting on Sunday. Sentence7: Yes, what area would you like to stay in? Sentence8: Great, let's book that one. Please send me the address, postcode and reference number. Sentence9: Booking was successful, the total fee is 22 GBP payable at the station. Reference number is : BUBQRD4R . Sentence10: Yes I also need a train that leavers after 12:00 going to ely. Sentence11: There is the Acorn guesthouse in the moderate price range and 4 stars. It also has free wifi and parking. Sentence12: There is no train leaving 12:00, but train TR5484 leave 13:50 do you want to adjust your time? Sentence13: Don't care. but I'd like a place that's Moderately priced and offers free WiFi. Sentence14: East London. Thanks Sentence15: How many days do you plan on staying? Sentence16: That is all I need, good bye. Sentence17: How many people would you like it booked for and for what days please? Sentence18: Hi, I am hoping to find a 4 star hotel room. Can you recommend one for me? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'm sorry, they don't have an opening at 12:00. Would you like to try a different time or day? Sentence2: Hi. I am trying to find some information on a restaurant called India House. Have you heard of it? Sentence3: I was able to book your table on Sunday at 11:00 for 1. The reference number is FRGW4OO2 . Sentence4: I'm so happy we could help you out today. Enjoy your meal in Cambridge! Sentence5: Great can you book a table for one person at 12:00 on sunday? Sentence6: India House serves Indian food in the west of town and is expensive. Their phone number is 0122346166. Can I help with anything else? Sentence7: Thanks. That covers it then! Sentence8: Sure, let's try for 11:00, same day. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I have 19 places to stay with 4 stars and parking, which area would you prefer? Sentence2: OK, I don't need a room right now, but can I have the post code and phone number for Acorn? Sentence3: I need to find a 4 star hotel that also has free parking. Sentence4: Are there any guesthouses with free wifi? Sentence5: It is moderately priced. I don't have an exact price. Sentence6: I would like to be in the north area. Sentence7: How much per night? Sentence8: Thanks! That's all I needed today. Bye! Sentence9: Yes, all 7 guesthouses have internet available. What price range are you looking for? Sentence10: How about Acorn Guest House? Sentence11: There are no hotels that fit your criteria. However, there are 7 guesthouses available. Would you like me to book one of those for you? Sentence12: Sure. Postcode cb41da and phone number 01223353888. Is there anything else I can do for you? Sentence13: Thank you, have a great day. Sentence14: Oh, cool. It really doesn't matter. Which would you recommend? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User