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: Which hotel is a star of 3? Sentence2: Gonville, shall I book it for you? Sentence3: Yes, that would be fine. Please book it for 7 people starting Tuesday for 2 nights. Sentence4: I'd like to find a hotel in the centre of town with free parking, please. Sentence5: I am leaving from cambridge and need to arrive at london liverpool street by 08:00 for a meeting. Sentence6: Sure thing. There are 2 hotels available, Gonville hotel and University Arms Hotel. Which hotel do you prefer? Sentence7: The Booking was successful, the total fee is 116.2 GBP. Reference number is : 1P1T8F7D . May I help with anything else? Sentence8: The duration lasts 88 minutes. Have a nice day. Sentence9: Do you have a departure or arrival time you would like? Sentence10: No, that's all I need right now. Thank you and have a nice day. Bye Sentence11: Success. Your reference number is NQF2R59K . Sentence12: Thank you. I also need a train going to london liverpool street on wednesday. Sentence13: Let's try it for one night then please Sentence14: Yes please book the the train for 7 people and can I get the reference number. Sentence15: TR1047 will get you there by 7:27, will that work for you? Sentence16: I 'm afraid the booking was unsuccesful. Would you like to try another day or a shorter stay? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System