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 have found TR1530 that leaves cambridge on thursday at 12:36 and arrives in norwich at 13:55. Can I book a seat on this train for you? Sentence2: No that's all you can help me with. Sentence3: Well, Thursday. Have to get there from Cambridge by 14:30. Sentence4: I'm looking for information on la tasca. Sentence5: I'll be happy to book a train to Norwich for you. On what day and time would you like to travel? Sentence6: How many people will be dining with you? Sentence7: No thank you, I just need the travel time. Sentence8: I also need to get to Norwich on Thursday and I need to be there at or just before 14:30. Sentence9: It serves Spanish food and is located in the centre of town. Sentence10: Have a great day! Sentence11: I need a booking for 4 people at 12:00 on wednesday. Sentence12: Great! Can I book a table for lunch Wednesday? Sentence13: Okay! Travel time is 79 minutes. Can I help you with anything else? Sentence14: Your reservation is all set! Your reference number is PN280GZ3 . Do you need anything else? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System