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: Back to the guesthouse now ... what is the price range for your favorite one? Sentence2: Thank you. I need a hotel with free parking and free wifi. Sentence3: I would like a place like a guesthouse that has at least 4 stars. Sentence4: First, can you give me my reference number for the train? Sentence5: We have 16 possible guesthouse matches with parking and internet. What price range are you interested in? Sentence6: the arbury lodge guesthouse is quite nice. It's cheap too. Sentence7: I'm leaving on Saturday. Sentence8: Yes please. I need 6 tickets. Sentence9: Yes, there are many. Where are you departing from? Sentence10: Thanks, that's all I needed today. Goodbye! Sentence11: Can you help me find a train leaving after 9:15 going to Ely? Thanks. Sentence12: Yes, the Train ID is TR7738. Sentence13: I am departing out of Cambridge. I really do need to leave sometime after 21:15 for sure. Sentence14: Your reference number is DALA684J Sentence15: I have two on Saturday. Would you like me to book one? Sentence16: I'd love to help you with that. There are so many hotel options in the area. Can you help me narrow it down a bit? Area? Price range, etc.? Sentence17: Thank you. I also need a hotel. Sentence18: There are 14 trains available. What day will you be leaving? Sentence19: Sorry can we go back to the train for a moment? I need the reference number, not the train ID for my booking. Sentence20: I have booked 6 seats for you on saturday. Would you like some restaurant suggestions in ely? Sentence21: Where would you like to stay on your trip? Sentence22: You're very welcome. Have a great day. Goodbye. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System