Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: Departing from the hotel and arriving at the restaurant by 19:15. Sentence2: Now I need a taxi. Sentence3: You're welcome! I hope you have a wonderful trip! Sentence4: The postcode is cb41da. How else may I help you? Sentence5: Can you help me find a restaurant? I want to find a place in the centre. Sentence6: I want kirkwood house- I don't need a booking, just the postcode. Sentence7: yes, it will arrive by 19:15 Sentence8: And thank you for texting the cambridge towninfo centre. Take care! Sentence9: There are a few options in the centre ranging from cheap to expensive. Do you have a price range you would prefer? Sentence10: I have booked a taxi from kirkwood house to the dojo noodle bar for you. A white honda will pick you up. The contact number is 07516276037. Is there anything else I can help you with? Sentence11: I'm afraid there's none of those in the centre. Would you like to try and different area of town? Sentence12: I'll need a ride there. Can you arrange a taxi for me? Sentence13: Your booking was successful at dojo noodle bar. Your reference number is SB1NTSYB . Is there anything else I can do for you? Sentence14: Sure! There are plenty of restaurants in the centre to choose from. What type of food do you prefer? Sentence15: Thank you. I appreciated your assistance. Sentence16: Will the taxi arrive to the restaurant by the booked time? Sentence17: First we need to book you a hotel or guesthouse. Do you have any preferences for location or price? Sentence18: What about a restaurant that serves asian oriental food in the centre instead? Sentence19: no not really. why don't you pick one a reserve a table for 4 at 19:15 on wednesday please Sentence20: I'd like to find a vegetarian restaurant, if possible. Sentence21: Where will you be departing from? Sentence22: that will be okay for now thanks Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System