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 have two restaurants that meet your needs, Graffiti and Travellers Rest. Would you like to make a reservation at one of those? Sentence2: Yes, I need to book a table for five people at 17:15 for this Thursday. Sentence3: Thank you so much. Have a nice day. Bye. Sentence4: A reservation at 16:15 was successful at Graffiti. Your reference number is VCCP7L4M . Is there anything else I can help you with today? Sentence5: You're welcome, have a good meal. Sentence6: Will you check 16:15? Sentence7: Are there any expensive British restaurants in town? Sentence8: There are 57 restaurants that match your specifications. Do you want anything more specific? Sentence9: Yes, I'd like to find one in the west side of town. Sentence10: I am unable to book a restaurant at that time on Thursday. Is there another day or time slot I can check for you? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes as long as its in the same area and price range. I need a reference number too then please Sentence2: I'm looking for a cheap restaurant in the west area. Sentence3: I was unable to book that, would you like me to try something else? Sentence4: Okay that is all I need for now. Sentence5: I was able to get you into Thanh Binh. Your reference number is CLIBOL1Q . Sentence6: Let's go with La Margherita. Could you book a table for 2 people at 13:30 on Saturday? Sentence7: Thank you and goodbye. Sentence8: You have your choice of La Margherita, which serves Italian food, or Thanh Binh, which offers vietnamese cuisine. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes they do. Sentence2: The hotel is four stars. Sentence3: Sure, its located on 172 chesterton road and the number is 01223306283 Sentence4: I would like to find a very expensive indian restaurant, can you help me? Sentence5: Curry garden is located in the centre at 106 Regent Street City Centre. It's phone number is 01223302330 and the postcode is cb21dp. Sentence6: What is the star of the hotel? Sentence7: Certainly! Cambridge boasts 14 such establishments. Would you prefer a specific area of town? Sentence8: Thanks, I also need the location of kirkwood house. Sentence9: Do they have free parking? Sentence10: No I need to find an indian restaurant, anywhere in cambridge that is expensive please. I need the area located, address and postcode please. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System