Given the task definition, example input & output, solve the new input case.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Example: 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
Output: Answer: (A) User
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 case for you: Sentence1: Unfortunately I am unable to book at 22:00 at Caffe Uno, do you have another time? Sentence2: I need the reservation for three. Sentence3: Ok, TR6692 leaves Cambridge at 19:21 and arrives in Stevenage at 20:10. Will this work for you? Sentence4: I can help you with both of those things. Let's start with what type of food or what part of town you would like to eat. Sentence5: How many people will be dining at cafe uno? Sentence6: thanks alot.that is all i needed for today Sentence7: Yes I have one restaurant matching your criteria called Royal Spice. Would you like their telephone number? Sentence8: That ticket will be 12.80 pounds. Sentence9: Sounds good. Can you book a reservation for Tuesday at 22:00? Sentence10: Could I get the price of that train please? Sentence11: How about cafe uno in the centre? Sentence12: He, I am looking forward to trying some local restaurants in Cambridge. Can you tell me about some train schedules? Sentence13: No thanks, I need a train from cambridge to stevenage in Tuesday. I want to arrive before 21:00 Sentence14: Um I meant 14:45, my mind wandered, who wants dinner two hours before midnight, lol. Same booking but 14:45 please. Sentence15: Thanks. Now I think you could help me with an expensive Italian restaurant perhaps? Sentence16: Great! glad I could help! Sentence17: Booking was successful. The table will be reserved for 15 minutes. Reference number is : MRKAMZJM . Anything else I can help with? Sentence18: Can you help me find a cheap restaurant in the north with indian food? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System