You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I am trying to find information about ADC Theatre, can you help me? Sentence2: No, actually that takes care of everything I need. Have a great day now! Sentence3: Yes, please give me the phone number. Sentence4: adc theatre is in the centre of town on park street, would you like their phone number? Sentence5: You're quite welcome! Thanks for contacting the Cambridge TownInfo Centre and have a great day! Sentence6: Sure, the phone number is 01223300085. Can I help you with anything else? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User