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

Example Input: Sentence1: No thank you. Can I have to phone number and postcode for that restaurant? Sentence2: I need a train to Kings Lynn. Sentence3: Thank you for using our service. Sentence4: The earliest train leaving after 17:00 on Friday leaves at 17:11. Would you like me to book this train for you? Sentence5: That would be TR9226 Sentence6: The phone number is 01223247877. It's located in the cb13nl postcode. Sentence7: Hmmm....how about an expensive restaurant serving gastropub food in the east? Sentence8: Thank you, goodbye. Sentence9: I am looking for a restaurant in the east that serves international food. Sentence10: No. There are two moderately priced restaurants with international cuisine in the centre of town. Would you like to hear about those? Sentence11: Book it, please. I need a single ticket. Sentence12: The the missing sock fits that criteria and is in the cheap price range. How else can I assist you? Sentence13: What day would you be wanting to travel? Sentence14: There's one restaurant that fits your requests, would you like me to book a reservation? Sentence15: Thanks again for the information! Sentence16: Have a great time. Sentence17: Have a great day as well. I think you'll love the Royal Standard. Sentence18: Thank you so much. Have a nice day! Sentence19: Friday please. From Cambridge leaving after 17:00 Sentence20: Can you give me the train ID on that one please? Sentence21: Is there one in the expensive? Sentence22: You have been booked for the train. Your reference number is 0UIC4MX9 . Can I help you with anything else? Question: Who has spoken the sentence 20? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: There is one concert hall in town, The Man on the Moon, located at 2 norfolk street in the centre of town. Do you need more information? Sentence2: Can you make a recommendation and please provide the entrance fee, phone number, and postcode. Sentence3: Can you help me find a concert hall? Sentence4: Cafe Jello Gallery Phone is o12233289438 and is on 13 Madalene treet Sentence5: Yes, I would consider a museum. Sentence6: great, there are 7 museums in the west. Sentence7: I need a concerthall on the west area of town. Sentence8: I am sorry I have only one listing for the city center. Would you consider other attractions? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: When would you like to leave the restaurant? Sentence2: Hello I am seeking a restaurant in the west side of Cambridge to eat at. Please only suggest expensive places. Sentence3: i also want a taxi to get to the hotel after the restaurant Sentence4: I was able to book a table for 7 at 15:30 on Monday. Your confirmation number is C1555WJL . Can I help you with anything else? Sentence5: I suggest Graffiti. Would you like a table there? Sentence6: Then I suggest the huntingdon marriott hotel. It is on kingfisher way, hinchinbrook business park, huntingdon. Would you like for me too book it? Sentence7: Yes, I need a place to stay. Something that is expensive and has free wifi. Sentence8: Booking completed! Booked car type : black volvo Contact number : 07237462964 Sentence9: I would like to eat British food. Sentence10: There are 9 matches. Do you have a food preference? Sentence11: Yes please. Book it for he same group of people and 3 nights starting from the same day. Sentence12: Wait, I want it to go to the restaurant by 15:30. Sentence13: Yes, please. I need a table for 7 at 15:30 on Monday. Sentence14: Booking was successful. Reference number is: VJ7YQQS7 . Is there anything else I can help you with? Sentence15: I'm not really set on an area, however, please make sure that they are a 4 star hotel with free parking. Sentence16: There are 5 expensive hotels with free wifi. Do you have a preference of area? Sentence17: Thank you for contacting the Cambridge TownInfo centre. Goodbye Sentence18: Thank you so much for all the help! Question: Who has spoken the sentence 8? (A) User (B) System
Example Output:
Answer: (A) User