You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Solution: Answer: (A) User
Why? The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input: Sentence1: If that is all you need assistance with I thank you for using our service. Have a great day! Sentence2: I am all set. Thanks! Sentence3: Thank you for your help. Sentence4: The police department is 01223358966 Sentence5: Would you like to make a reservation at Curry Prince? If so, for how many and when? Sentence6: I have a train that leaves at 06:09 and arrives at 07:54. Would you like me make a reservation? Sentence7: I've found four in that area. Curry prince and Rajmahal are moderately priced. Pipasha restaurant and Sitar Tandoori are more expensive. Do any of these sound good to you? Sentence8: I am leaving on Sunday and I want to arrive in cambridge by 8:45. Sentence9: I just need one ticket, please. Sentence10: Your booking was successful, the total fee is 30.24 GBP payable at the station . Your Reference number is : PFLVZ20N . Is there anything else I can help with? Sentence11: I am looking for a place to dine in the east part of Cambridge that serves indian food. Sentence12: Great your reference number is 63U62R15 Sentence13: I need a reservation for 7 people on Sunday at 11:30 please and can you give me the reference number? Sentence14: Thank you for the information Sentence15: No that will be all. Thanks for your help! Sentence16: You should go to the local police department? Sentence17: Yes, and give me the train id, please. Sentence18: Curry Prince sounds good. Thank you. Sentence19: The train ID is TR0466, how many tickets do you need? Sentence20: Is there anything else I can help you with today? Sentence21: Thanks! I also need a train departing from leicester and arriving by 8:45. Sentence22: I need to report a crime. Sentence23: Thank you, enjoy. Sentence24: I can help you with that, what day would you like to travel? Question: Who has spoken the sentence 20? (A) User (B) System
Solution:
Answer: (A) User