You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: So the Royal Standard is in the east? Sentence2: Sure, the Royal Standard is located at 290 Mill Road City, Centre, cb13nl and their phone number is 01223247877. Can I help with anything else? Sentence3: Yes it is. It not far at all Sentence4: Yes please, can I get the postal code and entrance fee? Sentence5: Where you wanting the taxi to pick you up at Cherry Hinton Hall or the Royal Standard and at what time? Sentence6: We are looking for a place to go while in town in the east. Sentence7: I have 10 places on the east side. Do you know what type of attraction you may like? Sentence8: Yes, I confirm the Royal Standard is in the east. Do you want me to book it for you? Sentence9: Yes, I would suggest royal standard. Sentence10: Is that close to the food place ? Sentence11: Ok perfect I also need a taxi to commute between the two places. Sentence12: Can you give me the address and phone number of it? Sentence13: I don't have any concerthalls. But I do have cherry hinton hall and grounds, which is of attraction type "Entertainment." Would you like to hear more about it? Sentence14: I would also like to find a place to eat. Can you find a gastropub restaurant in the expensive range? Sentence15: I would like to be picked from Cherry Hinton at 22:00 and arrive at the Royal Standard, please. Sentence16: A concerthall would be really nice. Do you have one? Sentence17: the postcode is cb18dw. unfortunately, i don't have information regarding the entrance fee. Sentence18: Your booking is completed! Your car type is yellow Toyota and contact number is: 07964380334. Can I assist with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System