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

[EX Q]: Sentence1: I'm sorry, but we just reserved your table. There is no car type. But since you ask, did you need a taxi? Sentence2: Thanks, that's all I need today. Goodbye! Sentence3: Could i please get the phone number and address? Sentence4: good day and thanks for using our services Sentence5: I only have one restaurant in the north for European food, but they have amazing food. It's called City Stop Restaurant. They are expensive but so worth it! Sentence6: book a table for 2 people at 13:15 on tuesday. Sentence7: I would like the north please. Sentence8: I am thinking I would like to try some european food while I am in town. Sentence9: Yes I need a taxi that will take me between the two places and need to arrive by 13:15. Sentence10: Okay. I have a taxi booked. It will be a yellow bmw and the contact number is 07135918917 Sentence11: The Botanical Gardens at Cambridge University are a favorite destination. The entrance fee is only 4 pounds. Sentence12: What is the car type, please thank you Sentence13: There are several to choose from, in which part of town would you like to concentrate? Sentence14: Sure, the phone number is 01223336265. The address is bateman street. Can I do anything else for you? Sentence15: Yes, I would like the information on parks that are located in the centre please. Sentence16: Your booking was successful! The table will be reserved for 15 minutes. Reference number is : ZLRYLH3O . Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No that's all I needed. Thank you! Sentence2: Mumford Theatre sounds great. May I have their address and entrance fee, please? Sentence3: The bridge guest house phone number is 01223247942. Can I help you with anything else? Sentence4: Hi, I'm traveling to Cambridge and I'm excited about tourist attractions. I'm looking for theatres in the centre of town. Sentence5: Can I please get their phone number as well? That's all I'll need for the day. Sentence6: I have many. May I suggest either The Cambridge Arts Theatre or Mumford Theatre? Sentence7: Unfortunately I am unable to find information on the entrance fee but the address is anglia ruskin enterprise, east road. Their phone number is 08451962320 Sentence8: Sure. The Bridge Guest House is at 151 hills road. Did you need any other assistance? Sentence9: Alright, thank you. I'm also looking for a particular hotel. It's called the Bridge Guest House, could you help me find it? Sentence10: You are very welcome, anytime. Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: The hotel should be in the cheap price range and should include free wifi. Sentence2: Thank you for calling. Have a nice day. Goodbye. Sentence3: Thank you for your help. Sentence4: We dont have any one star hotels Sentence5: Thank you for using our services. Do you need further assistance? Sentence6: Sure, please book it for 4 people for 5 nights from saturday. Sentence7: I'm interested in places that you can get a 1-star room for the night. Sentence8: Is it a 4 star place? Sentence9: No, I am done for the day. Thanks again. Bye! Sentence10: Booking was successful. Reference number is : XQ9KI92A . Sentence11: I have The Cambridge Belfry, it is cheap and has wifi. Would you like me to book it for you? Sentence12: It is a 4 star hotel. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User