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: La Mimosa sounds good. Can your reserve me a table for 1 on Saturday at 11:15? Sentence2: Sure, either La Mimosa or Shiraz both serve excellent Mediterranean food. Sentence3: There are 33 possible places that fit your request. For example, there is an expensive African restaurant in the centre. Is this something you would be interested in? Sentence4: How about mediterranean food? Sentence5: I have that reserved, the reference code is MLZZDYT5 . Sentence6: Can you help me find an expensive restaurant in the centre area? Sentence7: It's my pleasure. Goodbye! Sentence8: Perfect. I'm all set the. Thank you. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User