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: We have trains leaving before 8 every day this week, which day is preferred? Sentence2: i want to leave on monday and arrive by 8 Sentence3: I was also wanting to get some help finding a train to get me to London Kings Cross. Sentence4: Ok, the TR228 will get you to london at 07:51. It leaves cambridge at 07:00. Can I book it for you? Sentence5: Hey, when I was a kid my parents took me to a place called the cow pizza kitchen and bar. Is it still around? Sentence6: That was all I needed to know. Thank you, goodbye. Sentence7: Excellent, thank you for the assistance! Sentence8: You're welcome, have a great day. Sentence9: Your table has been booked. Your reference number is JGNHU2IV . The table will be reserved for 15 minutes. Sentence10: It certainly is. It's located at Corn Exchange Street. Sentence11: You're welcome, is there anything else I can help you with? Sentence12: The train is TR2289. The fare is 23.60 pounds. Do you need more information? Sentence13: Can you tell me the price? Sentence14: What day would you like your train to leave? Also what time, and where will you be departing from? Sentence15: I need to book a table for 5 at 16:45 on wednesday. Sentence16: I would like to leave on Monday. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System