You will be given a definition of a task first, then some input 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: There are several. Would you like British, Chinese, Gastropub, or Indian cuisine? Sentence2: What time would you like to leave and arrive for your taxi? Sentence3: Thank you, I also need a place to stay with free parking and free wifi. Sentence4: Book me a table of five for Tuesday at 11:30 in one that serves British cuisine. Please get me the reference number as well. Sentence5: Thank you for using Cambridge TownInfo centre. Have a great trip! Sentence6: There are 29 different hotels that fit this request. Did you need it in a certain area or did you prefer a certain price range? Sentence7: Yes, I'd also like it to be expensive and on the east side. Sentence8: I want to find an expensive restaurant in the east side. Sentence9: I need it to pick me up in time to get me to the restaurant before 11:30. Can I get a contact number and car type please? Sentence10: Yes please. I'll also need information about a taxi service as I won't have transportation on this trip. Sentence11: The car is a black lexus and the contact number is 07421870215. Sentence12: It is a hotel-hotel. Its named holiday "inn" and I completely understand, it can be confusing. Would you like me to book you a room? Sentence13: It sounds like you're looking for Express by Holiday Inn Cambridge then! Sentence14: Great thanks! That's all I need. Sentence15: I was able to successfully book a table for 5 at the Grafton Hotel restaurant at 11:30 on Tuesday, your reference number is 701570FS . Sentence16: That would work well what type of hotel is it? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System