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

Example Input: Sentence1: Ok, how about Chinese food? Still expensive and in the north please. Sentence2: I also need to book a taxi between the hotel and restaurant. I need to arrive by 19:45. Sentence3: Ok, you are booked for a 19:45 arrival time, the taxi is a white audi. Is there anything else? Sentence4: Saigon city serves Asian oriental in the north part of town. Sentence5: What time do you need to leave by? Sentence6: We want to find a restaurant that serves unusual food. Sentence7: Can you pick the best swimming pool and get me the postcode and phone number please? Sentence8: Awesome. Now can you tell me if there is a swimming pool nearby the restaurant? I love to swim after egg rolls! Sentence9: There are two in the north; Jesus Green Outdoor Pool and Kings Hedges Learner Pool. Would you like the location of either of those? Sentence10: Contact number is 07625009528 Can I help you with anything else? Sentence11: I was able to make a booking for the hotpot. You reservation number is 55CAP7FC . Sentence12: Let me have a reservation at Hotpot on Friday, thank you. Sentence13: That's pretty offensive to call Asian oriental unusual. I'm looking for a restaurant that serves food labelled as unusual. Sentence14: Ok, how many people and what time? Sentence15: I just need it to arrive by the time the restaurant was booked. Sentence16: Can I get the contact number for the taxi as well, please? Sentence17: I have no restaurants that list there food as unusual, do you have any other preferences? Sentence18: I'm going to recommend the kings hedges learner pool located at jedburgh court, kings hedges the post code is cb42xh. The phone number is 01223353248. Sentence19: 7 people for the taxi. Sentence20: 7 people at 19:45 on friday. Sentence21: No thank you. Sentence22: How many people are traveling? Sentence23: Have a nice day. Sentence24: No, just please make sure the food's unusual, located in the north and expensive. Sentence25: Do you have a particular type of food you'd like to try? Sentence26: yes, there's a place called the hotpot Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Great. I was finally able to get you into the Autumn House staring Friday for 3 nights and 3 people. your booking reference is C5ARPTZ2 . Sentence2: Sorry about the confusion earlier. I was able to book your room at Leverton House for Friday, 3 nights for 3 people. The reference number is U5B3PHWC . Sentence3: It was my pleasure. Goodbye! Sentence4: Can you try 3 nights instead? Sentence5: Perfect. I would like to book it for 3 people for 4 nights starting on Friday. Sentence6: Awesome. Thank you for everything! Sentence7: I can help you with a taxi. Please tell me your departure and destination sites along with your time frame. Sentence8: Yes let's try a different hotel. Sentence9: How about Cambridge Contemporary Art, on 6 Trinity St? Entrance is free. Sentence10: The Leverton House is a guesthouse located on the east side of Cambridge. What information are looking for? Sentence11: Both of them are booked solid for the days you requested. Would you like a hotel in a moderate price? Sentence12: I'd like to visit a museum if possible. Sentence13: Can they accommodate 3 people for 4 nights? Also, what are their phone numbers? Sentence14: I'm sorry. I am unable to book your stay. Could you arrive on another day or stay for a shorter amount of time? Sentence15: I'm sorry, it doesn't look like the Leverton House will be able to accommodate you. How about Allenbell or Autumn House? They are in the same area and also inexpensive. Sentence16: Can you please check for 3 nights at the same hotel for 3 people and can I have the reference number? Sentence17: I'm sorry both of those hotels are booked solid. Would you consider slightly more expensive accommodations? Sentence18: Okay. I'll need a taxi too. Sentence19: I want to leave the hotel by 22:00 to go to the Museum you mentioned. Sentence20: I'm looking for places to go in the centre of town. Sentence21: I'm also going to need a taxi, please. Sentence22: Sure. But I still need to book a hotel. Is there anything else available? Sentence23: Do you have the phone number for Autumn House's front desk? Sentence24: There are many attractions in the centre of town. Could you be more specific about what you're looking for? Sentence25: I'm looking for information on the Leverton House hotel. Sentence26: Sure. It's 01223575122. Anything else? Sentence27: They don't have a room available for 3 nights either. Anything else you'd like me to try? Sentence28: A black skoda will pick up up at Leverton House at 22:00 and bring you to Cambridge Contemporary Art Museum. The contact number is 07697068185. Question: Who has spoken the sentence 15? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Your welcome. Have a great day. Sentence2: Nusha and tenpin are two entertainment places in the south. Are you interested in more information on one of them? Sentence3: No, I am all set. Sentence4: Nusha's phone number is 01223902158, and postcode is cb17dy. Tenpen's phone number is 08715501010, and postcode is cb17dy. Sentence5: thank you thats alll that I need Sentence6: I want general information on entertainment type places to go in the south. Sentence7: Is there any other info you need? Sentence8: I think we're all done here. Thank you! Sentence9: Have a great time. Sentence10: Yes, please give me the postcode and phone number to both places. Thank you! Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System