Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I would like to find a guesthouse with a 4 star rating. Sentence2: OK, I was able to get the reservation for you. The reference number is I36DJXLT . Can I help you with anything else? Sentence3: You're very welcome, have a great day! Enjoy Cambridge! Sentence4: Yes, for the same group of people on Monday at 17:15, please. Sentence5: I have a table reserved for you, they'll hold it for 15 minutes. The reference number is WU3RYCER . Can I help you with anything else? Sentence6: Would it be possible for you to book another day? Sentence7: The alexander bed and breakfast would fit your needs would you like me to make a reservation for you Sentence8: I'd like Italian food, please. Sentence9: There is a Pizza Express in the centre that is moderately priced. Would you like to book there? Sentence10: YES I NEED IT FOR 3 PEOPLE FOR 2 NIGHT STARTING MONDAY AND I NEED THE REFERENCE NUMBER Sentence11: Find a restaurant in the centre that's the same price range as the hotel, please. Sentence12: Hello. I'd like to find a hotel to stay in for the weekend. I'd like one with restaurants and entertainment within walking distance. Sentence13: I found over 20 choices. Is there a certain type of food you're interested in? Sentence14: No, thank you for your help. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User