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: Okay. Where are you looking to go to? Sentence2: I booked a seat for you on TR9839. You can pay the 37.79 GBP due at the station. Reference number X6S3FKEF . Is there anything else today? Sentence3: The first train after that time on Thursday is the TR9839, leaving Cambridge at 15:21, arriving in Leicester at 17:06. Would you like to book a ticket? Sentence4: Did you have a particular day and time in mind? Sentence5: No thanks, I need to find a train leaving from cambridge next. Sentence6: I have 4 attractions in the north. Two of them are swimming pools, one is a park and one is a boating attraction. Do you have a preference? Sentence7: Yes, please book a ticket for one. Sentence8: What is the entrance fee for the boating attraction? Sentence9: I am planning a trip to Cambridge and I would like to know nice places to visit in the North. Sentence10: I will be traveling on Thursday and I need to leave sometime after 15:00. Sentence11: Thank you for using our system today! Sentence12: No, you have helped me tremendously. Thank you! Sentence13: There is no entrance fee listed. I can give you their phone number if you would like? Sentence14: I'm headed to Leicester. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User