Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I'll take any type of cuisine, then. I just need a reservation for 6 at 13:15 on Saturday. Sentence2: Unfortunately, I was not able to locate a Mexican restaurant in the south part of time. Would you like me to search for a different cuisine? Sentence3: Mexican, please. Sentence4: Okay I guess. Try booking there please. Sentence5: I am sorry. There is no japanese restaurant in the south area? Would you like to try another area or food type? Sentence6: Great! I was able to book you there and your reference number is W2A8GHG8 . Sentence7: Thank you for your help. Have a great day. Sentence8: I am looking for Japanese food in the south part of town. Sentence9: Yes please. Are you sure there are no Japanese or Mexican places in the same price range open on the south side that day? Sentence10: The Mexican place is not open then, shall I try another place to dine? Sentence11: Thank you for using the Cambridge TownInfo centre. Have a wonderful day! Sentence12: No I am sorry. But there is a Portuguese restaurant if you are interested. Sentence13: Try Mexican, then. Sentence14: There are Japanese, Italian, Modern European, Portuguese, Indian, and Mexican. Which of these do you prefer? Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System