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: I also need reservation for food. Sentence2: No, don't worry about it. I already got a reservation earlier. That is all I need. Sentence3: Sure, for 5 people at 13:45 on Friday. Sentence4: Hello, can you tell me about some Asian Oriental restaurants in the centre? Sentence5: I recommend j restaurant. Would you like a reservation? Sentence6: The TR8519 train leaves at 5:35 and arrives at 5:52 Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 9Z2BJHO4 Sentence8: Okay, what day are you traveling and what is your destination? Sentence9: make a booking for the same group of people. Sentence10: Would you please recommend one? Sentence11: Booking was successful, the total fee is 22 GBP payable at the station. Reference number is : J71IZZAE . Is there anything else I can assist you with today? Sentence12: I need to get from ely to cambridge, on that same Friday. Sentence13: I am will need a train. Sentence14: Thank you for using our service today. Sentence15: There are several. Would you like a list of all of them, or do you have a preferred price range? Sentence16: Do you know what kinda of food you want. Question: Who has spoken the sentence 6? (A) User (B) System
Solution:
Answer: (A) User