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 am departing from Norwich. I would also like to leave on Wednesday. Sentence2: Hello, we have many trains going to cambridge. Where will you be departing from? Sentence3: No, Clare Hall is a college. Sentence4: clare hall is an excellent choice on the west end. Sentence5: Yes, I would like some suggestions on places to go on the west side of town. Sentence6: There are a total of 14 trains leaving Norwich on Wednesday every hour beginning at 10:16. Would you like to book the 10:16 train or any later train? Sentence7: You're welcome. Please come back if you have any other questions! Sentence8: I'm looking for a train to cambridge leaving after 09:30, can you help? Sentence9: The 10:16 will be great, I'd like to book for 1 person please. Sentence10: I recommend Whale of a time and the post code is cb238el Sentence11: I am looking for attractions on the west side of town related to entertainment. Please recommend one and provide the postcode Sentence12: Is this a type of entertainment? Sentence13: Ok thank you, that's all I need today. Sentence14: Your fee will be 17.6 GBP, payable at the station, and your reference number is J3K7VE8G . Do you need anything else today? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User