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: TR0060 leaves at 19:29 and arrives by 20:07. Does that work for you? Sentence2: I'm leaving from Bishops Stortford on Thursday. I'd like to leave after 18:30. Sentence3: Your reference is TTZCS4Y4, is there anything else you need? Sentence4: I am planning to visit Cambridge soon and need schedule information. Sentence5: No, that is everything I needed. Thank you. Sentence6: Can we try for 1 night instead of 3? Sentence7: Unfortunately they are all booked for that duration. Would you like to try another hotel? Sentence8: That's OK, I won't have a car with me. Can you book the Avalon for 3 people for 3 nights, starting Thursday? Sentence9: I am happy to help, when will you be traveling and where will you be coming from? Sentence10: Yes, those times are good for me. Would you give me the price and train ID, please. Sentence11: The Avalon is a 4 stars guesthouse in the north, the price is moderate. There is not free parking in this hotel. Sentence12: Thank you for contacting Cambridge TownInfo centre. Have a great time! Goodbye! Sentence13: The train id is TR0060 and the price is 10.10 pounds. Would you like me to book that for you? Sentence14: Not at this time, thanks. But I would like to look for some hotel information. A friend told me to check out the Avalon. What can you tell me about it? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System