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 is all for now. Thank you Sentence2: I'm open to it, and I suppose the centre will do. But I'd prefer the west side if there is one. Sentence3: That's okay, Cityroomz will work. Can you book it for 3 people for 2 nights starting on Tuesday? Sentence4: Yes I am looking for a Train that departs from Cambridge and arrives at Birmingham New Street. Sentence5: Yes. Please select the first train available after 14:30 and book 3 tickets. then provide me the reference number Sentence6: Reference number is : Z9RFJQ4W . Anything else you need? Sentence7: Booking was successful, the total fee is 225.3 GBP payable at the station. Reference number is : XMBOA4E1 . Can I help with anything else? Sentence8: Would you like to try cityroomz? I can book it for you? Sentence9: I'm so sorry. There are no hotels on the west side that match your requests. Sentence10: Cityroomz is moderately priced and in the centre. Are you open to places that offer free parking, or do you specifically want to avoid it? Sentence11: Thank you for contacting us. Have a great day! Sentence12: I need a place to stay in Cambridge that includes free wifi. I don't need free parking. Sentence13: I will be leaving on Wednesday after 14:30. Sentence14: Ok. When were you looking to leave? Sentence15: Is it in the West? what is the price range? Sentence16: There are 9 trains listed. Would you like tickets for one of them? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System