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 want a train going to london kings cross. Sentence2: I would like to travel on monday and leave after 15:30. Sentence3: Have a great trip. Sentence4: Thanks, that is all I need. Sentence5: Booking was successful.Reference number is : 1HLAC0TN . Sentence6: Yes I would like to book it for 2 nights from Saturday for 3 people please. Sentence7: Please book the 17:70 for 3 people. Sentence8: Yes please it needs to be for three people. Sentence9: Sorry about that. Worth House is a cheap guesthouse located in the north. Sentence10: I was able to book it, reference number is M9MIP9U1 Sentence11: There are four trains that depart every two hours. The earliest leaves at 17:70 and the last one leaves at 23:00. What's your preference? Sentence12: Great, thanks! Also, can you tell me about the Worth House, please? Sentence13: I didn't ask about a restaurant. I'm pretty sure that's a hotel. Sentence14: I am departing from cambridge. Sentence15: We have 70 trains that meet that criteria, what is your point of departure please? Sentence16: Great! What day would you like to leave? Do you have any preferred times to leave and arrive by? Sentence17: Actually, the earliest train, TR7786 leaves Cambridge at 17:00 and arrives at 17:51. Should I go ahead a book this for 3 people? Sentence18: i am not sure is that a restaurant? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System