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

Example Input: Sentence1: Yes, see if 15:00 is available. Sentence2: I am sorry, I was unable to reserve a table for that time on Saturday, would you like to try a different time slot? Sentence3: I need a guesthouse in the cheap price range. Sentence4: Yes, I am also looking for a restaurant called The Nirala. Sentence5: Do any of these hotels have 4 stars? Sentence6: Booking was a success! Sentence7: Any area is fine, but I'd like to book rooms for 8 people. We'll be staying 5 nights, beginning on Saturday. Can any of them accommodate that? Sentence8: I have many results for a cheap guesthouse, would you like to narrow it down to stay in a particular area of the town? Sentence9: Glad that I could be of service. Goodbye! Sentence10: I'd like to book a table there for 8 at 16:00 on Saturday, please. Sentence11: I was able to get you rooms at the Alexander Bed & Breakfast. Reference number is : HREOM15W . Can I be of further assistance today? Sentence12: The nirala serves indian food in the north side of town. It is located at 7 Milton Road Chesterton, phone 01223360966. Is there anything else I can help with? Sentence13: Could you please provide the reference number? Sentence14: Great - that's all I need today. Thanks for your help! Sentence15: Sure thing. The reference number is Z1YHIR0Y . Sentence16: Yes, in fact 7 of the 9 hotels in your search criteria have 4 stars. Would you like to narrow your search by area? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: i want some mexican food. Sentence2: Dojo Noodle Bar serves asian oriental food and is located in the centre of town. The price range is cheap. Sentence3: The phone number for dojo noodle bar is 01223 363471. Would you like any other information? Sentence4: I don't care. Sentence5: You're welcome. Goodbye. Sentence6: We have four Asian oriental restaurants in centre. What price range do you prefer? Sentence7: What is the phone number? Sentence8: No, thank you, that's all I need. Thank you and goodbye! Sentence9: The only listing for Mexican food is Chiquito Restaurant Bar. How else may I assist you? Sentence10: I want a restaurant in the centre and serves asian oriental food? What is the phone number? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: great saint mary's church is an architecture attraction in the centre of town. Their phone number is 01223350914. Sentence2: I can't look at a hotel because you didn't read correctly and didn't select hotel. Thanks Sentence3: Yes they do. Should i book a room for you there? Sentence4: I would prefer a 4 star. can you recommend one and give me their price range? Sentence5: There are many! Do you need parking? Sentence6: I am looking for great saint mary's church in Cambridge Sentence7: Sorry! Do you have any 4-star guest houses available? I don't care about the price range, I just need to know what it is. Sentence8: That would be fine. Do they offer free parking? Sentence9: i got seven options one of them is cheap and the rest are moderate Sentence10: yes we have four of them in the area Sentence11: i could like to know what kind of attraction type it is, its area and phone number Sentence12: Cambridge has quite a few guesthouses. Do you prefer a particular area of town? Sentence13: Any price range will work, whatever you recommend. I need a 4 star guesthouse with free wifi. Just let me know the price range and of the have free parking. Sentence14: You've given me all the information I need today. Thank you. Sentence15: Is free wifi offered here? Sentence16: Do you have any in the north? Sentence17: your welcome, have a great day! Sentence18: Yes, it does have free wifi as well. Would you like to continue with the reservation? Sentence19: to narrow our options, can you tell me your price range? Sentence20: Okay, I'm also looking for a place to say. Needs to be a guesthouse with free wifi. Sentence21: I've located that for you. What would you like to know about it? Sentence22: Yes the north area please. Sentence23: I do need parking. Sentence24: Sure, do you care about price or star ratings? Sentence25: I would recommend acorn guesthouse. I hear it's quite nice. Would you like me to book it for you? Sentence26: Thank you, I'll take the moderate price that is 4 stars. Question: Who has spoken the sentence 15? (A) User (B) System
Example Output:
Answer: (B) System