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: Which area do you want to go to? Sentence2: I don't prefer a part of town. I need to find a train to get there. Can you help me with that too? Sentence3: I would like to visit a college, what would the entrance fee be? Sentence4: I am sorry I cannot find anything for those specifications Sentence5: Christ's College is free admission. Sentence6: Are you sure? Can you please check again for a Wednesday train from Birmingham New Street to Cambridge, arriving by 18:15? Sentence7: Booking was successful, the total fee is 75.09 GBP payable at the station . Reference number is : JWJXOOQU . Sentence8: I'm sorry there are no trains that fit that criteria. Would you be able to arrive any later? Sentence9: Yes please, just one ticket. Sentence10: I find it hard to beleive there are no trains arriving by 18:15. It doesn't need to arrive AT 18:15 just before that. Please check again. Sentence11: Almost all of them are free. Christ's college is famous and free. What part of town do you prefer? Sentence12: Thank you that is all I needed today. Sentence13: Great I also need a train departing from birmingham new street and arriving by 18:15 Sentence14: I'm sorry for the confusion earlier, I hope you have a lovely time here. Sentence15: Christ's college is located in Centre. Where will you be departing from on Tuesday and what time? Sentence16: I'm just looking for a cool place to go later. Sentence17: TR2286 leaves birmingham new street at 14:40 and arrives in Cambridge at 17:23. The price is 75.10 pounds and takes 163 minutes. May I book this for you? Sentence18: I would like to leave on tuesday. Sentence19: Yes, when would you like to travel? Sentence20: hold the phone. what is the entrance fee for christ's college? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System