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

Sentence1: Thank you. Is there anything else? Sentence2: It is in the centre, not the west. Sentence3: No that's it, thank you. Sentence4: Okay, what time do you need to leave? Sentence5: Sure, I need a reservation for 4 people and 3 nights starting on Saturday. Sentence6: Thank you so much! Sentence7: I need to leave the restaurant by 09:15 to go the hotel. Can you book a taxi for me? Sentence8: Thanks again for using our service, enjoy your stay! Sentence9: I was able to reserve that for you. Your reference number is 28PZGFFT . Sentence10: Sala thong is a great thai restaurant on the west side located at 35 Newnham Road Newnham. Do you need any more information? Sentence11: There is bangkok city in the centre would you like me to make you a reservation? Sentence12: Are there any expensive thai paces in the area? Sentence13: Is that in the west? Sentence14: Booking completed! Booked car type : yellow volvo Contact number : 07044362431 Can I help with anything else? Sentence15: What postcode is that? Sentence16: I need something in the West Sentence17: The gonville hotel is in the city centre. It is expensive, and has 3 stars. Free internet and parking. Address is gonville place. Can I get you a booking? Sentence18: cb39ey. What else may I do for you? Sentence19: I also need a taxi that will leave the restaurant by 09:15 Sentence20: I would like information on the Gonville hotel. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User