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

Example Input: Sentence1: Would you like British food? Sentence2: Where are you going or coming from? Sentence3: I will be leaving Cambridge and heading to Ely. Sentence4: The TR8399 leaves from Cambridge on Monday at 09:50. Shall I book that for you? Sentence5: Oh that's great. That would be all, thank you. Sentence6: Sure, that works for me. I need the phone number, postcode, and address for the restaurant. Sentence7: Is there a certain time you need to arrive by? Sentence8: I am looking for a restaurant. The restaurant should be in the centre and should be in the moderate price range. Sentence9: You have 2 seats reserved, and you'll pay 8.8 GBP at the station. Your reference number is 90RLYZKX . Can I help you with anything else? Sentence10: I don't have a food preference. Sentence11: yes, for 2 people. Please give me the reference number. Sentence12: I just need to leave after 08:45 Sentence13: Cotto is a great british restaurant located on 183 East Road City Centre. Their postcode is cb11bg and phone number is 01223302010. Is there anything else you need? Sentence14: Please find me a train that leaves on Monday after 08:45 Sentence15: There are 21 restaurants in the centre. Do you have a certain type of food you'd prefer? Sentence16: Thank you for using our service today. Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You are booked for a red lexus with the contact number 07866626052. Sentence2: I'm going to loch fyne. Sentence3: Thank you. I am now finished. Sentence4: Sure! when would you like to arrive? Sentence5: Great! And what is your destination? Sentence6: I would like to arrive by 01:15. Sentence7: I'm glad we could help. Have a good day. Sentence8: Please help me reserve a taxi from saint catharine's college Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: How about Tang Chinese? They are an expensive Chinese restaurant at Napier Street City Centre. Would you like me to make a reservation? Sentence2: No, I don't need a reservation. Just the phone number and post code please. Sentence3: Okay, there are a lots of options. What type of food would you like to eat? Sentence4: You're welcome. Enjoy your meal. Thank you for contacting the centre. Goodbye. Sentence5: I'm trying to find an expensive restaurant in the centre of town. Sentence6: I don't have any restaurants that meet that criteria. Is there another type of food or area you would be interested in? Sentence7: Belgian food please Sentence8: Ok, how about Chinese food then? Sentence9: You are quite welcome. Is there anything further I can assist you with? Sentence10: Great! Thanks so much. Sentence11: their phone number is 01223357187. and port code is cb11hr Sentence12: No that is all. Thanks Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System