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: You will need to pay a fee of 35.2 GBP at the station and your reference number number 7089L1RT . Sentence2: I have the TR8792 which you will arrive at 10:07. How many ticket please? Sentence3: You're all set! Your reference number is YGF92ATC . Can I assist you with anything else? Sentence4: That is all I need. Sentence5: Is there a certain time on Friday? Sentence6: Yes, I am going to Ely. Sentence7: Yes, please, for 8 people, for 3 nights, starting Tuesday! Sentence8: I would like to leave on Friday. Sentence9: Enjoy your stay. Sentence10: I have a train that leaves at 7:50 Monday morning to to to Ely. Does this interest you or is there another day you had in mind? Sentence11: Price doesn't matter. I need a reservation for 8 people, 3 nights starting Tuesday. If that day fails, the Sunday and the reference number. Sentence12: We have 19 options that meet your criteria. Would you like to narrow it down by area or price range? Sentence13: i am also looking for a place to stay. The hotel should include free wifi and should include free parking. The hotel should have a star of 4. Sentence14: I need to arrive by 11:45. Sentence15: Ok, do you know what your destination is? Sentence16: Arbury Lodge Guesthouse is supposed to be nice, as long as you're ok with a guesthouse rather than a hotel. Would you like me to book that one? Sentence17: i would like a ticket for 8 people. Sentence18: I'm looking for a train leaving cambridge and arriving by 11:45 Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System