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

Ex Input:
Sentence1: Does it have internet? Sentence2: I can help you with that I just need to know what time you'd like to be picked up from the guesthouse? Sentence3: No, that is it. Thank you so much. Sentence4: I have 3 great guesthouses in the east. I recommend Warkworth House. Would you like to book a room? Sentence5: The Yu Garden is a Chinese restaurant in the East, would you like to book a table? Sentence6: How about a Chinese restaurant? Sentence7: There are no australasian restaurants in the east. Would you like to try a different cuisine or can I check another area for you? Sentence8: Can i get the address and number to Yu Garden? Sentence9: I'm happy to be of service, and thank you for using the Cambridge TownInfo Centre! Sentence10: I would like to leave at 5:45. Sentence11: Yes it does. Would you like to make reservations? Sentence12: Hi, I am looking for a nice moderately priced hotel located in the east. Sentence13: Okay, thanks. I'm also looking for a place to eat that serves Australasian food. Can you help me with that? Sentence14: Warkworth does offer internet. Sentence15: Yes, the address is 529 Newmarket Road Fen Ditton and the postcode is cb58pa. Sentence16: The taxi will pick you up at the guesthouse at 05:45 and will be in a white lexus. Their contact number is 07730745339. Is there anything else I can help you with? Sentence17: Thank you. I also need a taxi to get between the two places. Sentence18: Maybe. Does it have 4 stars? Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I'm sorry, I only know that it is moderately priced. Can I book a room for you? Sentence2: What is the price range? Sentence3: Is there a particular area of the city where you'd like to stay? Sentence4: No that's all. Thanks! Sentence5: Yes. There are a number of hotels with wifi. Archway House is one of them that I can recommend. Sentence6: You have a nice day. Good bye. Sentence7: Howdy! I'm in town for the night and need a place to stay. I'd like a four star joint with free parking, if you please. Sentence8: no that's fine. Sentence9: Nice! I hope you enjoy this beautiful city, I found 5 hotels for you. What is your price range? Sentence10: Is there anything else you will need today? Sentence11: Archway house is in the moderate price range. They are located at: 52 gilbert road. Anythign else you need? Sentence12: I have 16 guesthouses that are 4 star and have parking, do you have any other requirements to help narrow the search? Sentence13: I don't have a price range. As long as it's nice. Sentence14: Sure, what is its address and price range? Sentence15: Do any of those have free wifi? Sentence16: No, I don't care about the area, either. But do you have a guesthouse? Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: NO thanks, no need to book for now. That is all of the info that I need. Sentence2: Moderately priced options in the north are abundant. Do you have any particular preferences or needs I should enter into the system to narrow it down? Sentence3: Ok great. Anything else you need? Sentence4: I would book from acorn guest house, with 4 stars. Is that okay? Sentence5: I am leaving from cambridge to bishops stortford. Sentence6: TR2730 is the train ID. May I go ahead and book that for you? Sentence7: The hotel should be a guesthouse, in the 4 star range Sentence8: That trip would be 10.10 pounds per ticket. Sentence9: Yes, that sounds good. Can you book that for Wednesday. I have 2 people and want to stay 3 nights. Sentence10: Yes, are there any trains leaving town after 13:45 on Friday? Sentence11: Can i have the price as well. Sentence12: The booking was successful. Reference number is : YH1D51ZS . May I help with anything else? Sentence13: Can I have the train ID and price for the first train after 13:45? Sentence14: I'm looking for a moderate priced place to stay in the north part of town. Sentence15: Can we try for 2 nights instead. I'll need the reference number too. Sentence16: No. Do you have any suggestions? Sentence17: Thank you goodbye. Sentence18: I have several trains that will work for you. You can arrive as early as 16:07 or as late as 24:07. Sentence19: Where will you be leaving from and going to? Sentence20: You are welcome, have a great trip. Sentence21: We have plenty of options. Any other preferences? Sentence22: Unfortunately, that booking was unsuccessful. Would you like to try a shorter stay? Question: Who has spoken the sentence 21? (A) User (B) System

Ex Output:
Answer: (B) System