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: There's one that departs at 12:21. Would you like to take that train? Sentence2: YEs can you book that for me please? Sentence3: I need to get to Leicester. Sentence4: I have 3 choices of chinese restaurants. 2 are more expensive and there is 1 option that is cheaper. Do you have a preference? Sentence5: The address is Cambridge Leisure Park Clifton Way Cherry Hinton, the phone number is 01223244277. Would you like to book a table? Or is there anything else I can help with? Sentence6: Please find me a place in the South that serves Chinese food Sentence7: I need to take a train that arrives by 15:00 on sunday. Sentence8: The Lucky Star is a chinese restaurant in the south in the cheap price range. Sentence9: Sounds good. What is the address and phone number? Sentence10: Yes, I would like the one in the cheap price range. Sentence11: Thank you for calling and have a nice day. Goodbye. Sentence12: you are welcome Sentence13: Great, and where are you traveling to? Sentence14: The train will leave at 12:21. Do you need any other information? Sentence15: I am leaving from Cambridge. Sentence16: Yes I can, how many tickets would you like me to book for you? Sentence17: I found 198 trains. where are you leaving from? Sentence18: No, thank you very much. Sentence19: I actually just need the departure time please. Sentence20: Okay. Well goodbye then. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User