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: It's located in Postcode CB12TZ. They can be reached at 01223304050 if you have more questions. Would you like to book a room? Sentence2: Yes, the reference number is MU055FG9 . Can I help you with anything else? Sentence3: Can you give me the reference number for that please? Sentence4: Yes, I also need a hotel. It should be moderately priced, include free wifi and be in the centre of town. Sentence5: No that's all the info I needed I need a taxi between the hotel and restaurant though to get me there by 12:45. Sentence6: Can I get it's postcode? Sentence7: Yippee noodle bar on King Street meets your requirements if you want asian oriental cuisine. Sentence8: European, please. I want a table for 3 people at 13:45 on Saturday. Sentence9: Thank you for using our system! Sentence10: Can you tell me what type of hotel this is please? Sentence11: It is a moderately priced hotel in the city's centre. No stars. Sentence12: Can you try 12:45? Sentence13: I was able to book a yellow audi. The contact number is 07525058220. Sentence14: The galleria meets your needs. Would you like me to book it for you? Sentence15: I am in center area and need a moderately priced restaurant please. Sentence16: I have Cityroomz in the center that is moderately priced and offers free wifi. Would you like to book that? Sentence17: Yes, and can I get a reference number? Sentence18: We have 4 options for you. Would you prefer european or modern european? Sentence19: Okay, thank you, that's all I need. Sentence20: I was able to book a table for three at 12:45. Sentence21: Actually I'd like european food, please. Sentence22: Unfortunately the Galleria does not have any openings at that time. Would you like to try a different day or time? Question: Who has spoken the sentence 21? (A) User (B) System
Output: 


Answer: (B) System