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: Thank you! Enjoy your visit to Cambridge. Goodbye. Sentence2: May I have the postal code for the Gallery as well please? Sentence3: Okay, I have booked the 17:00 train for you. The arrival time is 17:51. Your reference number is FGAHEJD9 and the price is 23.60 pounds. Sentence4: We have quite a few options available to you. Is there a particular day you are looking to travel? Sentence5: It doesn't matter. Sentence6: Yes please. Could you also tell me how much it is & what time it arrives? Sentence7: No, that's all I needed. Have a nice day. Sentence8: I need assistance finding a train departing from Cambridge and arriving at London Kings Cross. Sentence9: Yes, it's cb30aq. Is there anything else I can tell you about it? Or something else I can help you with? Sentence10: Lynne Strover Gallery's address is 23 high street, fen ditton, entrance is free. Can I do anything else for you today? Sentence11: TR0945 leaves on tuesday at 17:00. Would you like me to book it for you? Sentence12: I'm leaving after 15:15 on Tuesday. What's available then? Sentence13: I have four, what time would you prefer to arrive by? Sentence14: I am also looking for a particular attraction. The name of the place is Lynne Strover Gallery. Can you give me the address and fee? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System