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 can take care of that for you. Would you like to be picked up at the college? And at what time? Sentence2: The number is 01223210353. I can make that booking for you, I would just need to know and arrival date and for how many people and length of your stay. Sentence3: There is a cheap guesthouse named Allenbell on 517a coldham lane if you are interested. Sentence4: I also need a place to stay. I am thinking a guesthouse in the east part of town. Sentence5: Thanks. I also want to book a taxi to commute between the college and the hotel. Sentence6: I want to leave the hotel at 15:15 to go to the college. Sentence7: Can you confirm if this hotel is 4 star? If so, I will need to book it for 1 person for five nights starting on wednesday. Sentence8: And just to clarify, what sort of attraction is it? I assume it's a college but sometimes things are named oddly, you understand. Sentence9: I was able to book that, your reference is 4B5YCEFU . Sentence10: Yes, downing college is a college. Can I do anything else for you today? Sentence11: Can you try for 2 nights instead? Sentence12: No, I think that takes care of it. Thank you. Sentence13: Sure, it is located in the centre area, on Regent Street, postcode cb21dq, their phone number is 01223334860. Sentence14: It is four stars but unfortunately I cannot book it. Would you like to change the date? Sentence15: Thank You, have a good stay. Goodbye. Sentence16: I have confirmed your taxi, a black bmw will be picking you up. Their contact number is 07830542895. Can I help with anything else? Sentence17: That sounds great. Can I have the number? Sentence18: I am looking for Downing College. Can you give me information on it? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User