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: Your train has been booked and your reference number is UXYKEGNB . May I help you with anything else? Sentence2: I'll be leaving from Kings Lynn. Sentence3: I am looking for information in Cambridge Sentence4: I also need a train to Cambridge. Sentence5: Ok wonderful, what will be your departure location? Sentence6: Is there a date and time that you would prefer? Sentence7: That's it! Thank you for your help! Sentence8: Please book me 1 ticket for the TR0415. Sentence9: Yes, there are 5 colleges in the west! Some are free and some have a small fee. Would you be interested in one of those? Sentence10: churchill college would suit your needs. The phone number is 01223336233 and the entrance fee is free. Sentence11: Yes, on Monday and I need to leave after 16:15. Sentence12: Okay the TR0415 leaves at 17:11 and arrives by 17:58. Sentence13: Sure, I can help you with all kinds of information. What do you need to know? Sentence14: Sure, just pick one, please? I'll need the entrance fee and phone number. Sentence15: Sorry, no parks in the west. Sentence16: hmm, what about a college? Sentence17: Sure, any time! Sentence18: Are there any good parks to visit in the west? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System