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: I hope you enjoy the rest of your day too! Sentence2: No. I also need a train. Sentence3: We've got about 5 to choose from. All of them are cheaper. Did you have a preference on the area? Sentence4: That one is perfect. Thanks for your help. Good bye Sentence5: The La Margherita meets your criteria. Would you like to book a table? Sentence6: I looking for an Italian restaurant that offers cheap food. Sentence7: Yes. Please book a table for 2 at 16:45 on friday and please give me the reference number. Sentence8: We have many trains I can book for you. Where are you departing from and going to? Sentence9: Booking was successful. The table will be reserved for 15 minutes. Your reference number is OWGTR8M7 . Will that be all? Sentence10: Departing Peterborough on Friday. Heading to Cambridge. I need to arrive by 09:45. Do you have anything? Sentence11: I would prefer one on the west area. Sentence12: TR1662 departs at 05:19 and arrives at 06:09. Will that work for you or would you like to try a later train? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User