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'm planning a trip to Cambridge and I was told the A and B Guest House was a great place to stay. Can you give me information about it? Sentence2: Okay, sounds good. Also I need to get a train from Liverpool street to Cambridge. Sentence3: Thanks for using our system! Sentence4: The train should leave after 12:45 and should leave on friday. for 2 people please book. Sentence5: I need two tickets. Sentence6: TR5015 leaves london liverpool street at 13:39 and arrives at cambridge by 15:07. Would this work for you? Sentence7: Yes, I would as a matter of fact. And yes the offer free parking. Sentence8: Absolutely! This is a moderately priced guest house with four stars. There is wifi included. It is located on the east. What else can I help with? Sentence9: Oh wait, you know what? I forgot to ask about star ratings. What's the star rating on the A and B Guest House, please? Sentence10: Does that train leave on Friday? Sentence11: Okay, two tickets are booked, for a total price of 33.2 GBP, and your reference number is MY04HJ0A, do you need anything else today? Sentence12: No thanks, that is everything. Sentence13: Yes, that train leaves on Friday. Sentence14: Do you have free parking? I refuse to pay for parking in a hotel that I am staying at. Wouldn't you agree? Sentence15: What day would you like to make this trip? Do you have any other specifications? Sentence16: It has four stars. Would you still like information on the train? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User