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: No, that settles everything! Thank you. Sentence2: I have 5 train options leaving from Bishops Stortford from Cambridge that arrive before 08:30. Would you prefer to travel on Saturday, Monday, or Friday? Sentence3: Thanks, can also get me information on a train departing from Bishops Stortford and arriving by 08:30. Sentence4: Could you give me a departure time and travel time for that train? Sentence5: Okay, you're all set! Your reference number is: 4AU76U6Y . Sentence6: I need that train on Monday please. Sentence7: I'm looking for a cheap place to stay in the north, what kind of options can you give me? Sentence8: Worth house has a 4 star rating and wifi yes. Sentence9: Please book it for 5 people and 4 nights starting from monday. Sentence10: TR0532 departs at 07:29 and arrives by 08:07. Would you like me to book it for you? Sentence11: Is there anything else I can help you with? Sentence12: I would like the one with the 4-star rating please. Does it include free wifi by chance? Sentence13: Not at this time. Thanks for your help. Sentence14: There are 2 guesthouses available. One is 0 stars and the other is 4 stars. Which do you prefer? Sentence15: Thank you for contacting us, have a nice day. Sentence16: Train TR0532 fits your criteria. Would you like me to go ahead and book that for you? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System