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: im glad i was of some help Sentence2: Can you help me find a train arriving at 18:15 going to cambridge? Sentence3: I'll need passage for five, but I also need to know what time the last train gets there before 18:15. Sentence4: Sure thing, would you like me to book this for you? Sentence5: Thanks again, thats all for now. Sentence6: Is there anything else I can do for you? Sentence7: That'll do. I'll need 5 tickets. Sentence8: It is at colville road, cherry hinton, postcode cb19ej, phone 01223576412. Sentence9: Okay, thank you. Sentence10: I am leaving Peterborough going to Cambridge on Monday and I need to get there by 18:15, can you help me with that? Sentence11: no thats all for today Sentence12: Monday would be best please. Sentence13: I need to find some place in the east for multiple sports. I'd like to get the address, phone number, and postcode please. Sentence14: which day do you want to travel to narrow down my options Sentence15: Sure! Where are you heading in from? And what day? Sentence16: Okay. Enjoy your visit to cambridge! It's a wonderful place. Sentence17: Booking was successful, the total fee is 82.5 GBP payable at the station . Reference number is : CWLKMZER . What else can I do for you today? Sentence18: how about TR3021? it leaves at 05:19 Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System