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: Thanks! I also need help finding a train leaving friday arriving by 21:15. Sentence2: The Milton Country Park has free admission. They are located on the North and the phone number is 01223420060. Sentence3: Booked! The price is 10.1 pounds to be paid at the station. Reference number: 2CDCW6I7 . Sentence4: I want to find a park to visit in town. Sentence5: Thank you and have a good trip. Sentence6: Fantastic. Thank you very much for all of your assistance. Sentence7: I need to go to Cambridge, from Stansted Airport. Sentence8: TR5694 leaves at 09:24 and arrives at 09:52 giving you plenty of time. Can I book you a ticket? Sentence9: I have train TR3342 ariving at 21:01. Sentence10: Yes please, a ticket for one, and may I also know the price? Sentence11: I don't really care, just pick one and give me the phone number please. Sentence12: There are 5 parks around town. What part of town would you prefer to visit the park in? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System