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 need the train to arrive by 11:15. Sentence2: If you can't find a guesthouse, could you look for a hotel? Sentence3: i would prefer the south. are there any in that area? Sentence4: I don't have anything in the expensive range that fits that criteria. Sentence5: There is a variety of guesthouses to choose from. How much would you like to spend? We have cheap, moderate, and expensive. Sentence6: The train departs at 09:50. Sentence7: I don't know where I am staying. I'm looking for a guesthouse and I thought you could help. Sentence8: please book it for 3 people and 5 nights starting from Thursday. Make sure you get the reference number Sentence9: The TR3246 arrives at 10:07, would you like to book that train? Sentence10: There is one expensive hotel in the south -- The Lensfield Hotel. It is a 3-star hotel. Would you like to book a room? Sentence11: Certainly. It looks like the trip is 17 minutes long. When would you like to leave? Sentence12: There are 5 available hotels. What area were you looking to stay? Sentence13: The Lensfield Hotel will be expecting the 3 of you to arrive on Thursday and to stay for 5 nights. Your Reference number is : VOGVC4RY . Sentence14: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence15: Great, that's all I need, thanks so much for your help! Have a great day! Sentence16: Great. I'm not ready to book today though. I am also looking for a place to stay. Sentence17: where are you staying and for how long and how many rooms please Sentence18: When does that train depart? Sentence19: I would like the expensive price range. Sentence20: I am leaving Tuesday and need to take a train from Cambridge to Ely Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System