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: The cost is 12.80 pounds for all trains leaving Cambridge to Stevenage on Friday. Would you like to book a seat? Sentence2: It should be in the west part of town. Sentence3: That is going to stevenage, correct? Sentence4: It is located on storey's way. There is no entrance fee! Do you need help with anything else? Sentence5: No thanks, I am all set. Sentence6: Thankyou, I am looking for a trian that leaves on friday. I am also wanting it to leave after 12:30. Sentence7: No it is going to london kings cross, do you need to go to stevenage? Sentence8: There are about 13 attractions in the west. I have several colleges, museums, and one entertainment attraction. Which would you prefer? Sentence9: I'm not picky, choose one for me! Sentence10: How about Churchill College? Does that sound interesting? Sentence11: The TR3685 leaves at 13:00. Need a ticket? Sentence12: Yes, I must go to Stevenage. How much is a ticket? Sentence13: That sounds great. Can you get me the address and the entrance fee? Sentence14: What kind of attraction are you interested in? Sentence15: First tell me about the attractions in town in the west. Sentence16: Happy to be of help. Goodbye. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User