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 for contacting Cambridge TownInfo centre. Have a nice day! Sentence2: There are 33 expensive restaurants in the centre of town. Is there a specific type of food you would like? Sentence3: Can you help me find and insanely expensive restaurant located in the centre of town please? Sentence4: That would be perfect! Can I have a reference number for the train? Sentence5: OK. Can you give me their address and phone number? Sentence6: I'm sorry I was unable to find a fusion restaurant. Would you like to try another type of food? Sentence7: TR8494 leaves Cambridge at 13:11 and arrives by 13:58, will this suit your needs? Sentence8: When would you like to travel? Sentence9: You are more than welcome! Sentence10: I have trains departing as early as 05:11 in the morning and as late as 23:11 in the evening. Any time preferences? Sentence11: I want to take a train from Cambridge to Kings Lynn. Sentence12: I'll have to think about it, but thank you. Sentence13: Booking was successful, the total fee is 49 GBP payable at the station . Reference number is : JCZKJYT9 . Can I help with anything else? Sentence14: It will be on Friday. Sentence15: We have several. Do you have a preferred arrival time? Sentence16: I have two expensive mediterranean restaurants in the center. May I recommend shiraz restaurant for you? Sentence17: Yeah, so that restaurant. I want something that serves fusion if possible. Sentence18: Actually, sorry I got ahead of myself. I still want help booking a train that goes to kings lynn on friday after 13:00. I want to book for 5 people. Sentence19: I have train TR8494 that leaves at 13:11 would that work for you? Sentence20: I want one that leaves after 13:00 Sentence21: No, I need to leave after 13:00 Sentence22: That's all I need, thank you! Sentence23: Their phone number is 01223307581, and their address is 84 Regent Street City Centre. Would you like me to make a reservation? Sentence24: Yes please try mediterranean food. Question: Who has spoken the sentence 22? (A) User (B) System
Output: 


Answer: (A) User