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

[EX Q]: Sentence1: Yes I need a table for two. Sentence2: No there isn't. Sentence3: What day and time would you like the booking for? Sentence4: Zizzi Cambridge please Sentence5: I'm sorry could you confirm what restaurant you wanted to reserve a table for 2 at? Sentence6: That sounds good can you please give me the address and phone number? Sentence7: thanks for booking the reservation. Goodbye. Sentence8: How about this Tuesday at 17:00? I can check if they have any available tables. Sentence9: Sure thing! Zizzi Cambridge contact info: Phone: 01223365599 Postcode: cb21ab Address: 47-53 Regent Street. Would you like me to make a reservation there? Sentence10: Sure that sounds good. Sentence11: There are 5 cheap Italian restaurants. Is there a particular area you're interested in? Sentence12: Hello I am looking for a restaurant that serves Italian food and I need it to be cheap. Sentence13: How about something local, such as Zizzi Cambridge? It's located at the centre. Sentence14: I don't know. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Kymmoy is in the centre of town and the phone number is 01223 311911. May I help you with anything else? Sentence2: Thank you, I have all I need. Goodbye! Sentence3: What is the phone number and area? Sentence4: Is there any expensive restaurants in town serving Australian food? Sentence5: You're welcome. Thanks for your call! Goodbye. Sentence6: Kymmoy is an expensive asian oriental restraunt in town. Sentence7: I'm sorry, there are no Australian restaurants. Would you like another type of food? Sentence8: How about asian oriental food? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: That guest house is moderately priced and located in the east. Would you like to make a reservation? Sentence2: Do they provide free parking and internet? Sentence3: can i please get the address, postcode, and food type Sentence4: Ok, I can book you at Bedouin - address is 100 Mill Rd City Centre, CB12BD and they serve African food. Sentence5: They have free internet offered but not parking. Sentence6: That's fine I guess. I need to reserve a table at an expensive restaurant in the centre part of town, can you help me? Sentence7: Thank you that is all I needed today. Sentence8: I show 33 expensive restaurants in the Centre area of town. Before we narrow down your restaurant selection, let's complete your reservation with A and B Guesthouse. Sentence9: I am looking for a hotel called a and b guest house. Sentence10: You're quite welcome, have a wonderful time in Cambridge! Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User