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: Sorry there is not. How about another choice of food ? Sentence2: Leaving Cambridge to London kings cross and arrive by 19:45. Sentence3: I have a train departing Cambridge at 17:00 and arriving at London Kings Cross at 17:51. I don't have a later arrival time on Tuesday, unfortunately. Sentence4: TR0315 arrives at 13:51. is that fine with you? Sentence5: Definitely! Can you give me some more specifics so I can help? Sentence6: how about chinese? Sentence7: I am going to London kings cross. Sentence8: There aren't any Polish restaurants in the centre, are there? Sentence9: We have many Chinese restaurants! What's your price range? Sentence10: No. thanks. I don't need to book it right now. Sentence11: Ok, on what day will that be? Sentence12: It leaves Cambridge at 13:00. Sentence13: And what is your arrival destination and time of travel? Sentence14: Great! Thank you for calling and have a great trip! Goodbye. Sentence15: I'm not fussy about price, pick one for me and give me the address please, I'm starving! Sentence16: Is there anything else I can help you with today? Sentence17: I need to leave on Tuesday. Sentence18: Time I leave does not matter I just need it to arrive by 19:45. Sentence19: Alright. Could you please provide me with the train ID and the travel time? Sentence20: No, thank you. I have everything I need. Goodbye. Sentence21: Rice house is located at 88 Mill Road City Centre. Would you like for me to book a reservation? Sentence22: Just the address is all I needed for now. But could you also help me find a train? Sentence23: what is its departure time? Sentence24: That is TR0945. The train departs cambridge at 17:00 and arrives in London Kings Cross at 17:51. The travel time is 51 minutes. Can I book it for you? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System