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

Example Input: Sentence1: Could you tell me more about it? What is its price range? Where is it located in the south? Sentence2: I'm sorry that date and time slot is already full. Would you like to try a different date/time? Sentence3: It is expensive and the address is 15-17 norman way, coldhams business park Sentence4: what about 4:30 on tuesday? Sentence5: There is one Mexican restaurant in the south. The Chiquito Restaurant Bar. Would you like me to book it for you? Sentence6: Thank you, that is all I need today. Sentence7: I am trying to find a restaurant in the south of the city that serves modern American food. Sentence8: I was able to book a table for 1 at 16:30. Your reference number is P62404I5 . Sentence9: I didn't find any modern American restaurants in the south end. Are you open to other areas? Sentence10: Sounds delicious, could you book a table for 1 at 17:30 on Tuesday? Sentence11: You are welcome. Goodbye. Sentence12: What about a restaurant there that serves mexican food? Sentence13: It is in the expensive price range and is located at 2G Cambridge Leisure Park Cherry Hinton Road Cherry Hinton cb17dy Sentence14: Great! Can you also tell me the address and price range for the Express by Holiday Inn Cambridge? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: No specific area. Sentence2: Thank you, goodbye. Sentence3: I have found no restaurants serving Christmas food in the expensive price range. Would you like a different type of food? Sentence4: phone number and address of Cambridge Lodge Restaurant please Sentence5: is there any area you prefer! Sentence6: I want to find an expensive restaurant serving christmas food. Sentence7: Thank you for using the Cambridge restaurant system. Goodbye. Sentence8: Are there European types of restaurants? Sentence9: Cambridge Lodge Restaurant is in the west part of town, at Cambridge Lodge Hotel 139 Huntingdon Road City Centre. Their phone number is 01223 355166. Sentence10: Yes, there are four: cambridge lodge restaurant, eraina, and michaelhouse cafe serve european food, with darrys cookhouse and wine shop serving modern european food Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Which one would be available to book 5 people for 5 nights starting this Monday? Sentence2: I am looking for somewhere to stay in the east. Sentence3: I was able to book you in the Autumn House with reference number 8BCYNW35 . May I help with anything else? Sentence4: I have three hotels that meet your needs. Would you like more information on them? Sentence5: Yes, I would like it to be cheap and a type of guesthouse. Sentence6: That is all. Thank you. Sentence7: There are 7 hotels in the east. Do you have a price range or other needs to narrow them down? Sentence8: Let us know if we can help further. Good day. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output:
Answer: (B) System