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: That's correct, the number I gave you was the reference number you'll need. You'll need to pay 420.56 GBP when you get to the station. Is there anything else? Sentence2: Can you help me find a train? I am looking for that departs from Cambridge on Saturday. Sentence3: I would like to go to Birmingham New Street and the train should leave after 14:15. Sentence4: That would be great. Can you get me 7 tickets on that train? Sentence5: Is there anything I can help you with today? Sentence6: There are 202 trains leaving from Cambridge on Saturday. Can you give me a destination point so that I can narrow it down for you? Sentence7: Thank you. You have a night day as well. Sentence8: Ok. Is that also the reference number? Thanks. Sentence9: The TR3735 leaves at 15:01, will that suit you? Sentence10: Alright, you booking was successful, your confirmation number is KU1R7NQO . Sentence11: No, that would be all. Thanks. Have a night day. Sentence12: Okay. Thank you very much. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System