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: That guest house is moderately priced and located in the east. Would you like to make a reservation? Sentence2: Do they provide free parking and internet? Sentence3: can i please get the address, postcode, and food type Sentence4: Ok, I can book you at Bedouin - address is 100 Mill Rd City Centre, CB12BD and they serve African food. Sentence5: They have free internet offered but not parking. Sentence6: That's fine I guess. I need to reserve a table at an expensive restaurant in the centre part of town, can you help me? Sentence7: Thank you that is all I needed today. Sentence8: I show 33 expensive restaurants in the Centre area of town. Before we narrow down your restaurant selection, let's complete your reservation with A and B Guesthouse. Sentence9: I am looking for a hotel called a and b guest house. Sentence10: You're quite welcome, have a wonderful time in Cambridge! Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User