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: Is there a certain area of town you would like to be in? Sentence2: No thank you. I would like to know the arrival time, though. Sentence3: It doesn't matter, just so it leaves after 15:00. I'll just need the train id and arrival time please. Sentence4: I'll be traveling on Monday and I would like to leave after 15:00. Sentence5: No thanks. That gives me all I need. Take care. Goodbye. Sentence6: Thanks. Can you also find a museum ? Sentence7: What time do you need to arrive by? Sentence8: The arrival time is 16:07. Sentence9: Thank you for allowing me to assist you today. Sentence10: There are 70 scheduled trains on that route. Do you have a day or time you wish to travel? Sentence11: No, whatever your recommendation is. I will just need the area it's in and the entrance fee please. Sentence12: people's portraits exhibition at girton college in the west is very interest, the entrance fee is free. Do you need more info? Sentence13: the TR7177 leaves at 15:50, do you want tickets? Sentence14: I'd like details about trains leaving from Cambridge and going to Ely. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System