You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: What kind of food do they serve there? Sentence2: It appears they serve Italian food. Would you like me to book you a table? Sentence3: You're more than welcome! Sentence4: No, that is all I need. Thank you. Sentence5: La Margherita is in the west, cheaply priced, located at 15 Magdalene Street City Centre, and can be reached at 01223315232. Sentence6: I'm trying to find information on a particular restaurant, it is called la margherita. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User