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: Two for the same day. I need a taxi to commute between the two places to be sure it arrives by the booked time. The contact number and car type? Sentence2: I was able to book your table. Your reference number is : OSAGFN8W . Sentence3: Yes, that is correct. Is there anything else I can help you with? Sentence4: i am looking for information in Cambridge. A a place to dine. Sentence5: How many people will be staying with you and what day would you like to reserve your hotel room? Sentence6: book the one in the centre a table for 2 at 13:45 on thursday Sentence7: which side of town and what is the price range? Sentence8: There are 21 great places to choose from. Do you have a certain type of restaurant you are looking for? Perhaps Italian or European? Sentence9: Thank you. I will also need a hotel in that same area. Please, no guesthouses! Sentence10: Cityroomz has a 0 star rating with free internet, but does not provide parking. Would you like to make a reservation? Sentence11: I have the hotel and the taxi already? Sentence12: Yes, please. For 2 nights. Sentence13: you too have a great day Sentence14: Thanks, Those are all i need for today. Sentence15: Thank you so much. Sentence16: Let me know about your Italian restaurants. Sentence17: I want to eat Thai food. Sentence18: There are 3 options for hotels in the centre. There is one 0 star, one 3 star and one 4 star option. Which would you prefer? Sentence19: Your room is booked, ref #DOSETWFU, and a red Audi will pick you up and get you to the restaurant for that reservation. Contact number 07840525996. Sentence20: There aren't any Thai restaurants in that price range in the centre of town. Would you like to try something else? Sentence21: Moderately priced, in the centre of town. Sentence22: I want the place with 0 stars. Sentence23: You're welcome. Have a great day. Sentence24: Okay, I found two options for you: Pizza Express and Pizza Express Fen Ditton. Do either of those appeal to you? Question: Who has spoken the sentence 4? (A) User (B) System

Output: Answer: (A) User

Input: Consider 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

Output: Answer: (B) System

Input: Consider Input: Sentence1: Yes, please. I need 1 ticket. Sentence2: I also need to find a restaurant in the west with a moderate price range. Sentence3: I need to get out of the city on Friday, can you find me a train? Sentence4: how about one that serves british food? Sentence5: I have made that reservation for you on train TR2420 and your reference number is 2A3LMYL1 . Sentence6: I'm sorry, we don't have any Greek restaurants anywhere in town. Is there anything else that would work? Sentence7: Would train TR5767 work? It leavees at 05:00. Sentence8: I have three options with a moderate price range in the west. Would you prefer British, Indian, or Italian? Sentence9: Saint Johns Chop House serves British food and is located in the west. Would you like me to make a reservation? Sentence10: TR2420 leaves at 15:00. Would you like me to book it for you? Sentence11: What day will you be dining there? Sentence12: I have you booked on Friday at 10:00. The reference number is 5ALATF6D . Is there anything else I can help you with? Sentence13: There are many options available to you on Friday. Where would you be leaving from? Sentence14: That is all I will need, thank you. Bye. Sentence15: I will be dining there on Friday. Sentence16: I would like to depart from cambridge. Sentence17: Thank you for contacting Cambridge TownInfo Centre. I hope you enjoy your train ride and dinner. Sentence18: Do you have any options in the west with Greek food? Sentence19: No, we are going to norwich and need to leave after 14:15. Sentence20: Yes, please make a reservation for 6 people at 10:00. Question: Who has spoken the sentence 17? (A) User (B) System
Output: Answer: (B) System