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: I'm sure I will. Thank you. Sentence2: Is there anything else I can help you with? Sentence3: Autumn House is booked for you. 1 person staying 2 nights starting on Thursday. Your Reference number is : 8YGNKA7F . Can I assist you with anything else? Sentence4: Thank you very much! Sentence5: Could you book it for the same group of people and 2 nights starting from the same day. Sentence6: Ok, I can handle that for you. How many people will dining with you? Sentence7: Sure, I recommend Autumn House. It is on 710 Newmarket Road and is very popular. Sentence8: it's located in the centre. Sentence9: Okay, I was able to book a table for you. Reference number is : 1793CE4C . Can I help with anything else? Sentence10: There are several guest houses with 4 stars in the east. They are in the cheap and moderate price ranges. Do you have a preference? Sentence11: Great I would like to book a table. Sentence12: Could you please also find a taxi to commute between the hotel and restaurant. Sentence13: Thank you! I also need a guesthouse to stay in in the east. It doesn't have to have free parking, but I would like a 4 star place. Sentence14: No that's all! Thanks for the help. Sentence15: What time frame would you like it to be in? Sentence16: Okay. Your booking is completed. The car type is red Honda. The contact number is 07940318761. Sentence17: No preference. Could you pick one for me? Sentence18: I would to book a taxi that will arrive at the restaurant by 12:30. Sentence19: Where is this saffron brasserie located? Sentence20: You're welcome, have a great day! Sentence21: You are very welcome, enjoy. Sentence22: Well...I don't have any friends... I'll be going in on Thursday at 12:30. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System