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: its been a pleasure to serve you. Sentence2: I have that reservation made for you the reference number is 2U1NU0BI . Sentence3: There are a lot of trains running then. Did you have a particular station you were going to or leaving from? Sentence4: That would be great can you get me 4 tickets for that? Sentence5: I would also need a place to stay in a guesthouse with free parking Sentence6: I need a train leaving on monday after 18:45. Sentence7: Can you book it for the same people for 5 nights starting on the same day Sentence8: Is it cheap? And do they offer free parking? Sentence9: The Allenbell is an affordable guesthouse in the area. How does that sound? Sentence10: Yes, I need to travel from Kings Lynn to Cambridge. Sentence11: Thank you. That is all for now. Sentence12: I have train TR1978 that departs at 19:11 and arrives by 19:58. Do you think that would be a good fit for you? Sentence13: That has been booked. Your reference number is SGEZXO5V . Sentence14: They have free parking and internet. Is there anything else you would like to know? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System