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 traveling alone, can you tell me how much the train fare costs? Sentence2: I've made the reservation and your reference number is J1DOHU0T . Sentence3: I have booked you on one. Would you like a second train? Sentence4: The cost per ticket is 23.60 pounds. Would you like me to book a train for you? Sentence5: Done! Your train leaves London Kings Cross at 11:17. Please pay 23.6 Pounds at the station. Your reference number is IDCU3WFU . Can I help you with anything else? Sentence6: nandos is is a nice place. Do you want to book ? Sentence7: I would be happy to help you with that. What day are you traveling? Sentence8: So I'm interested in portuguese food. Do you know of any restaurants that serve it in the South? Sentence9: Ok, thanks for using our service. Have a great day! Sentence10: Opps no, that was an error on my part. I won't be needing anything else. Sentence11: I will be traveling on Wednesday. Sentence12: Yes, please. 5 people at 19:30 on wednesday. Sentence13: Great I am also looking to get a train from london kings cross that will arrive by 12:30 Sentence14: Thank you. I also need a train to to arrive in Cambridge by 12:30. Sentence15: Yes please book me on the train that arrives in Cambridge on Wednesday as closest to 12:30. Sentence16: I have 4 different trains that will meet your needs. Will you be traveling alone or with a group? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System