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

Input: Consider Input: Sentence1: Let's try for saturday, but if that is not available then tuesday would be fine Sentence2: I was able to book you for Saturday. Sentence3: That will be all, thanks again. Sentence4: I would like to leave after 21:30. Sentence5: What day will you be arriving? Sentence6: I found Alexander bed and breakfast . Do you want to make a reservation? Sentence7: Yes bookit for the same group of people 4 nights. Sentence8: thanks can I get a reference number please? Sentence9: Yes, i am looking to book a room at the alexander bed and breakfast. Sentence10: You are welcome enjoy Sentence11: Would you like to leave or arrive by a certain time? Sentence12: Yes, whichever train has seats available for 7 people. Sentence13: I'm looking for a train that goes to Cambridge on Saturday Sentence14: I will be departing from broxbourne. Sentence15: We have 3 options that meet your criteria. All depart within an hour of each other starting at 21:32. Would you like me to book one of them for you? Sentence16: Your booking was successful, the total fee is 100.24 GBP payable at the station. The train departs at 21:32. Your reference# is UZFW2TAQ . Is there anything else? Sentence17: Where will you be departing from? Sentence18: Your reference number is XVE54KKH . Is there anything else I can do for you? Question: Who has spoken the sentence 5? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: i am looking for information in Cambridge. Sentence2: I can certainly help you with that! What do you want to know? Sentence3: The hotel should have a star of 4 and should include free parking. Sentence4: I'd like to stay at a guesthouse that offers free wifi. Sentence5: The Alexander bed and breakfast is a great place. Do you need a reservation? Sentence6: Acorn Guest House would be perfect for your needs. Sentence7: yes, please. 6 people for 3 nights starting on thursday. Sentence8: Do you have a price range or area preference? Because if not, how about a and b guest house located in the east and moderately priced. Question: Who has spoken the sentence 2? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: it is a park. can i give you their phone numbers? Sentence2: I'm glad I could help you. Sentence3: Hello, can you recommend attractions in the Centre of town, please? Sentence4: The booking was successful. 8QCQDYFQ is your reference number for that booking. Is there anything else that I can do for you? Sentence5: Enjoy your day, goodbye. Sentence6: Certainly, I can help you with that. What time would you like to leave or arrive by? Sentence7: No thanks. Can you find a guesthouse with free parking for me? Sentence8: That narrows it down to 21 options. Would you like a particular star rating? Sentence9: Yes, I will need it for 5 nights. 2 people and starting Monday. Sentence10: Your taxi will be a yellow Volvo waiting at 11:00. The contact number for the taxi is 07072119452. May I help you with something else? Sentence11: Great that's all the info I needed today, thanks! Sentence12: There are 21 guesthouses. Do you have a preference in price range or area of town? Sentence13: I will need a taxi as well Sentence14: Not really. It's fine. Sentence15: Well, if you'll be visiting the centre, I recommend the El Shaddai. It's moderately priced with wi-fi and parking. Would you like me to make a booking for you? Sentence16: Me too. Have a nice day. Sentence17: Absolutely! My favorite place in the center of town is Cambridge University Botanic Gardens. It's beautiful there! Sentence18: That sounds great, thank you very much! What type of attraction is that? Sentence19: No, but I definitely need free wifi. Sentence20: I would like to leave the park by 11:00. Question: Who has spoken the sentence 9? (A) User (B) System
Output: Answer: (B) System