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

Positive Example 1 -
Input: 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

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: Yes I need it to go to cambridge, is that possible? Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : AYQO5ZTE . Can I help you with anything else? Sentence3: We have 2 trains that match your criteria - the TR0788 that leaves at 05:32 and the TR0605 that leaves at 06:32. Which one should I book for you? Sentence4: wednesday and I want to get there by 08:00 leaving broxbourne, how much is that? Sentence5: Do you need a taxi? Sentence6: Have a great day. Good bye. Sentence7: The trip will cost 17.90 pounds. Sentence8: I am planning a trip in Cambridge. Sentence9: what area please and how many tickets Sentence10: We have several great options, most of which are in the center of town. My favorite is Caffe Uno. Sentence11: No, I don't need it booked. What's the price for the TR0788? Sentence12: Sounds great. I need a reservation for 1 on Wednesday at 15:30 Sentence13: Yes, I am happy I could assist. Sentence14: The price is 17.90 pounds. Can I help you with anything else today? Sentence15: Okay, how can I help you? Sentence16: No that is it, thank you! Sentence17: im looking for an expensive restaurant that serves italian food Sentence18: I will also need a train Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System