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: That sounds great, thanks! Sentence2: We have two options that meet your criteria. Both have free parking and wifi. I would recommend Ashley Hotel. Will that work for you? Sentence3: You're welcome! Have a great trip! Sentence4: No that's all I need for now. Thank you! Sentence5: On what day do you need to travel from cambridge to stansted airport? Sentence6: Thank you! I'm also looking for a place to stay in the north. I'll need it to have a star of 2. Sentence7: Thank you so much! Goodbye. Sentence8: Okay! What is your destination? Sentence9: Actually, I am not ready to book yet. But, can you please tell me the phone number and postcode? Sentence10: Would you like me to book it for you? Sentence11: I would like to go to Stansted Airport, please. Sentence12: sure phone is 01223350059 and the postcode is cb41er, anything else today? Sentence13: Bye for real this time! Sentence14: I need to travel on Friday. Could you give me the travel time, price and train ID? Sentence15: I need a train departing from cambridge arriving by 17:45. Sentence16: Yes the train that departs at 16:40 has an ID of TR7062, and a travel time of 28 minutes and a price of 10.10 pounds. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System