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: That is all. Thank you for your help. Sentence2: What about Christ's college? it's free to get in. Sentence3: Okay, your reference number is 1A7ZKZ7F . Is there anything else you need? Sentence4: I am looking for places to go in town. Sentence5: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence6: Yes. I need to book for one. Sentence7: There are 10 trains fitting your criteria. Do you a time preference on arrival or departure? Sentence8: Train ID TR9236 leaves at 13:35 and arrives in Ely at 13:52. Would you be interested in booking that option? Sentence9: There aren't any attractions of that type in the Centre unfortunately, do you have an alternative preference? Sentence10: Sure, it is located on Saint Andrew's Street, postcode cb23bu. Admission is free. Can I be of further help today? Sentence11: Yes, it will need to leave after 12:30. I'll just book it for one person to cambridge. Sentence12: We have many options to choose from, is there a particular type of place you are interested in seeing? Sentence13: Somewhere in the Centre, entertainment. Sentence14: Can you give me the address for Christ's college please? Sentence15: Yes, I need a train coming from Ely on Friday. Sentence16: I could also go to a college instead. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System