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: I am looking for a train going to cambridge. Sentence2: Do you have a time you'd like to leave by? Sentence3: yes, please. I need the price and travel time. Sentence4: I would like to leave Broxbourne on Tuesday. Sentence5: That is for TR8361? Sentence6: Yes. TR8361 is 17.90 pounds. Would you like to buy a ticket? Sentence7: Sure, where are you departing from and what day? Sentence8: Your confirmation number is BAMJW6M2 . May I help you with anything else? Sentence9: I think you've answered all of my questions! Thank you so much! Sentence10: Not a problem. Have a good time! Sentence11: I'd just like to arrive by 16:45 please. Sentence12: TR8361 will arrive in cambridge by 16:32 on Tuesday, does this suit your needs? Sentence13: Thank you for your help. Sentence14: Yes I would like a ticket for one. Sentence15: You're welcome. Call us again when you need to. We're always here! Sentence16: The price is 17.90 pounds. The train leaves at 15:32 making the travel time one hour exactly. Is there anything else? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System