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: actually, i'm so stupid. i need a train FROM cambridge. i'm going to broxbourne. Sentence2: Is there anythign else I can help you with today? Sentence3: You have a lot of options. Would you like to narrow it down by departure site, departure time, or arrival time? Sentence4: Is there anything else? Sentence5: Find me a moderately priced place to dine in the west. Sentence6: TR2939 would have an arrival time of 13:01. Would you like to book this train? Sentence7: No thanks, I just wanted to know the arrival time. Sentence8: Ok. I have a table for 7 booked at saint johns chop house. Your reference number is XPKRJXC3 . They will hold the table for 15 minutes. Sentence9: Have a great trip. Sentence10: I have 3 options for you - British, Indian, and Italian. Do you have a preference? Sentence11: I also need a train to cambridge on sunday Sentence12: I am leaving anytime after 11:30 from cambridge to broxbourne, what is the arrival time? Sentence13: No problem, there are lots of options. Did you have a time to leave in mind? Sentence14: No, You have helped with everything I needed. Thanks so much for your time. Bye. Sentence15: How about the British place, I would like to book for 7 people at 13:15 on sunday Sentence16: Excellent, thank you so much. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System