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: Alright. I hope you have a great day! Sentence2: When does that train arrive? Sentence3: Could I have the phone number please? Sentence4: No, thank you. That was all I needed today. Sentence5: What time do you want to depart by and where from? Sentence6: The Lucky Star is a cheap Chinese restaurant in the south.The phone number is 01223244277. Would you like me to book you a reservation? Sentence7: Do you have anything leaving after 9:30? Sentence8: I'm sorry there is no phone number for that train. Sentence9: I need the train to leave after 9:30 from London Liverpool Street. Sentence10: There is a train leaving at 9:39. Would that work? Sentence11: I am leaving at 9:30. That is in the morning. Sentence12: Oh! Right. I need a phone number for a restaurant. A Chinese place, in the south, and on the cheap if possible. Sentence13: The train arrives by 13:07. Sentence14: There is TR5691 leaving at 11:39 today. It is 88 minutes and costs 16.60 pounds. Sentence15: Are you leaving in the morning or the evening? Sentence16: I need a train to cambridge for tuesday. Would you be able to help? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System