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: I have no preference. Just find something in the centre of town. Sentence2: The latest train leaves at 23:39. Sentence3: Sure, their phone number is 01223452587. Is there any other way I can assist you? Sentence4: Trains leave London Liverpool Street every 2 hours beginning at 5:39. The latest leaves at 11:39 and arrives in Cambridge at 13:07. Sentence5: No that is all for today. Sentence6: I'm looking for a train going to Cambridge and arriving by 2:45 PM. Can you help me? Sentence7: I am leaving from London Liverpool Street on Wednesday please. Sentence8: I can help with that! What day would you like to depart? Sentence9: What is the ID for the train leaving at 11:39? Sentence10: Do you have a certain area or attraction you would like to see? Sentence11: the train id is TR4161. anything else? Sentence12: Yes, I am looking for places to go to in town. Can you help me? Sentence13: enjoy your time in Cambridge! Sentence14: Could I have their phone number please? Sentence15: Give me information on the latest one. Sentence16: I would like to recommend all saints church,it is beautiful architecture in the centre of town and no entrance fee. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System