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

Example Input: Sentence1: I hear its a pretty cool place. Can I get their postcode please? Sentence2: Yeah, I need a place to stay on the south side. 4 stars if possible. Sentence3: Postal is cb17sr, they do include internet and they can be reached at 01223240089, can I help with anything else? Sentence4: i am looking for a particular attraction. Its name is called soul tree nightclub. Sentence5: You're welcome! Have a great day! Sentence6: Can you book me a stay at The Aylesbray Lodge? Sentence7: The Soul Tree Nightclub is located in the area of centre. It has an entrance fee of 4 pounds. The phone number is 01223477900. Anything else? Sentence8: The postcode is cb23qf. Do you need anything else? Sentence9: You have a great day as well! Sentence10: Thanks for using our services. Sentence11: Sure! How many are staying, how many days, and what day do you want the stay to start? Sentence12: That was everything, thanks a lot! Sentence13: No I just need the postcode, phone # and if they have internet Sentence14: We have two guesthouses that are 4 stars in the south end, The Aylesbray Lodge Guest House is moderately priced, and Rosa's Bed and Breakfast is in the cheap range. Question: Who has spoken the sentence 12? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I would recommend the cherry hinton water play on the east. It is also free admission. Sentence2: The duration is 163 mins.Do i need to book something for you? Sentence3: Thanks for the park info. In review, I don't see a train ID departing from Cambridge after 10:45. Do you have it? Sentence4: You're very welcome. Good day. Sentence5: I can help! What day are you looking to travel? Sentence6: I do not have a preference on a side of town. Sentence7: I need to leave on Thursday. Sentence8: I am looking for a park, can you help me with that? Sentence9: It is 163 minutes Sentence10: Okay Could I have their telephone number please? Sentence11: The phone number is 01223336265. Sentence12: Can you also tell me about some parks that I could visit? Sentence13: Their address is cherry hinton hall, cherry hinton road. Is there anything else I can help you with today? Sentence14: May I suggest cherry hinton water play, since it will be warm out. It's located in the east. Sentence15: I'm looking for a train going to Birmingham New Street. Sentence16: Is there an area you prefer? Sentence17: We've got about 19 trains for that route. Do you have a certain time you want to leave after or arrive by? Sentence18: Thanks. Can you please give me its address? Sentence19: Yes i'd also like parks I can go to. Sentence20: I think that is all I need today. Thank you for your help. Sentence21: I want to leave on Saturday and leave after 10:45. Could you give me the travel time? Sentence22: We have 5 great parks in town. My favorite is the Botanic Gardens in the center. It's well worth the 4-pound entrance fee. Sentence23: TR5669 leaves Cambridge at 11:01 and arrives at birmingham new street at 13:44. May I help with anything else? Sentence24: Sorry, how long is the travel time on the train? Question: Who has spoken the sentence 19? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: No. Pick whatever is available. Sentence2: acorn guest house is a nice place.Would you like the address ? Sentence3: We have quite a selection of lodgings in the north. Do you have a price range preference, or additional needs, to narrow down our search? Sentence4: Yes, I am looking for a 4 star hotel. Sentence5: We have 8 guesthouses with a 4 star rating. 7 of the them are moderately priced and one is in the cheap range. Do you have a preference? Sentence6: I need to find a hotel in the north part of town. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output:
Answer: (B) System