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

Example Input: Sentence1: Yes, see if 15:00 is available. Sentence2: I am sorry, I was unable to reserve a table for that time on Saturday, would you like to try a different time slot? Sentence3: I need a guesthouse in the cheap price range. Sentence4: Yes, I am also looking for a restaurant called The Nirala. Sentence5: Do any of these hotels have 4 stars? Sentence6: Booking was a success! Sentence7: Any area is fine, but I'd like to book rooms for 8 people. We'll be staying 5 nights, beginning on Saturday. Can any of them accommodate that? Sentence8: I have many results for a cheap guesthouse, would you like to narrow it down to stay in a particular area of the town? Sentence9: Glad that I could be of service. Goodbye! Sentence10: I'd like to book a table there for 8 at 16:00 on Saturday, please. Sentence11: I was able to get you rooms at the Alexander Bed & Breakfast. Reference number is : HREOM15W . Can I be of further assistance today? Sentence12: The nirala serves indian food in the north side of town. It is located at 7 Milton Road Chesterton, phone 01223360966. Is there anything else I can help with? Sentence13: Could you please provide the reference number? Sentence14: Great - that's all I need today. Thanks for your help! Sentence15: Sure thing. The reference number is Z1YHIR0Y . Sentence16: Yes, in fact 7 of the 9 hotels in your search criteria have 4 stars. Would you like to narrow your search by area? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Yes, what type of attraction is Cherry Hinton Water Play? Sentence2: Please book it and send me the confirmation code. Sentence3: Again thank you and have a great day. Sentence4: Thanks I'm also looking for a train that leaves on Thursday. Sentence5: Just one seat. Sentence6: OK, what are your departure and arrival stations, and what time do you want to travel? Sentence7: Before i book it, could you confirm the number of seats you need? Sentence8: You're welcome! Is there anything else I can help you with? Sentence9: It is a park. Sentence10: Excellent, I can't wait to visit it! Thank you. Sentence11: I am looking for information about the the Cherry Hinton Water Play Sentence12: excellent, have a great day! Sentence13: I'd like to go to Cambridge via Broxbourne. I'd like to leave on Thursday and arrive no later than 12:00. Sentence14: That is a free park on the east side of town. They are located at Cherry Hinton Hall on Cherry Hinton Road. Their phone number is 01223446100. Sentence15: I have on that arrives at 11:32. Would you like me to book that for you? Sentence16: Perfect thanks for the help thats everything I need! Sentence17: Well I glad i can help enjoy your stay ! Sentence18: Your booking was successful! The reference number is 698RE4W1 . The total fee of 17.89 is payable at the station. Question: Who has spoken the sentence 17? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I believe that will be the case. Anything else I can help you with? Sentence2: It looks like that day and time are full. Is there another day or time slot you would like to try? Sentence3: Just the postcode for the Cambridge and Country Folk Museum, please. Sentence4: Yeah, I need a place to go. I want to go to the museum and it should be in the west area. Sentence5: I was able to book the table for your party of eight at 16:00. The reference number is RLTOT7X2 . Can I help you with anything else? Sentence6: I have successfully booked your taxi. You will be riding in a blue BMW. The company's contact phone number is 07883192583. Would there be anything else I could help with? Sentence7: Yes, please. I need a table for 8 on Thursday at 17:00. Sentence8: The postcode is at cb30aq Sentence9: Is there a specific time you would like the taxi to arrive at the restaurant or museum? Sentence10: You're welcome! Have a nice day. Goodbye. Sentence11: No that will be all I need, thanks. Sentence12: Thank you. I also need a taxi to get between the restaurant and the museum. Sentence13: There is a Museum of classical archaeology on sidgwick avenue for free, and a Cambridge and Country Folk Museum located at 2-3 castle street for 3.50 pounds.There are also several free galleries in the area. Can I give you more information on any of these? Sentence14: Where can I find a Vietnamese restaurant in West Cambridge? Sentence15: I want to make sure that it will arrive by 16:00. Can you please confirm? Sentence16: How about a table for 8 on Thurday at 16:00 Sentence17: There is one vietnamese restuarant in the west area, thanh binh. Can I book a table for you, if so how many will be dining? Sentence18: By 16:00 and I need the contact number and car type please. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User