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: Can you give me their phone number please? Sentence2: I need a train to cambridge that will get me there by 20:30. Sentence3: Actually, yes. Can you help me locate a college to visit? Sentence4: No, that won't be necessary. I do need the departure time, and travel time though. Sentence5: Yes, their number is 01223336233. Is that all for you today? Sentence6: Alright, where will you be departing from? Sentence7: That's everything thanks. Sentence8: The train should depart from bishops stortford and leave on Thursday. Sentence9: Ok perfect! I have TR0060 which will arrive by 20:07. Would you like me to book this for you? Sentence10: Churchill college is in the west part of town. Sentence11: You are very welcome! I hope you have a fantastic time and enjoy your day! Sentence12: TR0060 will depart Bishops Stortford at 19:29, and it will take 38 minutes for your trip. Is there anything else I can help you with today? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System