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: Yes, please. I need 1 ticket. Sentence2: I also need to find a restaurant in the west with a moderate price range. Sentence3: I need to get out of the city on Friday, can you find me a train? Sentence4: how about one that serves british food? Sentence5: I have made that reservation for you on train TR2420 and your reference number is 2A3LMYL1 . Sentence6: I'm sorry, we don't have any Greek restaurants anywhere in town. Is there anything else that would work? Sentence7: Would train TR5767 work? It leavees at 05:00. Sentence8: I have three options with a moderate price range in the west. Would you prefer British, Indian, or Italian? Sentence9: Saint Johns Chop House serves British food and is located in the west. Would you like me to make a reservation? Sentence10: TR2420 leaves at 15:00. Would you like me to book it for you? Sentence11: What day will you be dining there? Sentence12: I have you booked on Friday at 10:00. The reference number is 5ALATF6D . Is there anything else I can help you with? Sentence13: There are many options available to you on Friday. Where would you be leaving from? Sentence14: That is all I will need, thank you. Bye. Sentence15: I will be dining there on Friday. Sentence16: I would like to depart from cambridge. Sentence17: Thank you for contacting Cambridge TownInfo Centre. I hope you enjoy your train ride and dinner. Sentence18: Do you have any options in the west with Greek food? Sentence19: No, we are going to norwich and need to leave after 14:15. Sentence20: Yes, please make a reservation for 6 people at 10:00. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System