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, could you provide me with your departure and destination locations? Sentence2: Yes, I also need help biking a train. Sentence3: And where will you be going? Sentence4: I would need the phone number and food type. Sentence5: I'll be departing from Cambridge and should leave on Friday. Sentence6: I will book it for you,is there anything else I can do for you ? Sentence7: It will arrive at 15:27. Anything else for you today? Sentence8: I would like the phone number of a cheap restaurant in the centre of town. Sentence9: I am going to london liverpool street. I'd like to leave after 12:15. Sentence10: No, that's all. Thanks so much! Bye. Sentence11: And what time will it arrive? Sentence12: The travel time is 88 minutes, and tickets are 16.60 pounds Sentence13: I am looking for a restaurant in the center with a cheap price range Sentence14: Please just tell me the ticket price and travel time Sentence15: I have found 15 restaurants in that area within the cheap price range. Do you want a certain type of food? Sentence16: Please recommend a restaurant. I really do not care about the food type. Thank you. Sentence17: Rice house is a chinese restaurant and their phone number is 01223367755. Is there anything else I can assist you with today? Sentence18: TR4187 is the first departure after 12:15, leaving at 13:59. Would you like to book passage? Sentence19: The two choices are chinese and asian oriental,which one would you like? Sentence20: You're welcome. Have a great day! Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User