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 this train ticket TR4887 birmingham new street cambridge friday 05:40 08:23 75.10 pounds 163 minutes Sentence2: It's Saint John's College. Can you find the phone number? Sentence3: There's a train that arrives at 10:23. Would you like me to book it? Sentence4: What is the name of the attraction? Sentence5: Great, thanks so much. I am also looking for a particular attraction. Can you see if it is still in Cambridge? Sentence6: I need it to arrive on Friday, by 10:45. Sentence7: Okay, have a great day! Sentence8: Hi, I'm looking for a train from Birmingham to Cambridge. Sentence9: It is leaving at 07:40,price is 75.10 pounds and travel time is 163 minutes. Sentence10: Here is the phone number you requested:01223338600. Sentence11: Great, thank you. That's all the information I require right now. Sentence12: Yes, 10:23 will be fine. Are you able to tell me the departure time, the price, and the travel time, please? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User