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: Have a great day. Sentence2: Yes the train arrives at 23:27 and the price of the fare is 16.60 pounds. Sentence3: Thank you goodbye Sentence4: Unfortunately, they often change so we do not have that information. But I can give you their phone number. It is 01223902158. Can I assist you with anything else? Sentence5: Thank you. I also need a book a train, leaving cambridge after 21:30. Sentence6: Yes, can you give me arrival times and prices, please? Sentence7: Ok and what is your destination? Sentence8: TR9557 leaves at 21:59, or, if that is too close to 21:30, TR3138 leaves at 23:59. Do either of those options work for you? Sentence9: I am looking for the Nusha. Can you help me? Sentence10: Sure, that is a fun entertainment venue located at Unit G6, Cambridge Leisure Park, on Clifton Road. Sentence11: what is the fee ? Sentence12: I want to go to London Liverpool Street on Friday. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System