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: I'd like to leave cambridge on sunday, please. Sentence2: Sure, I can help you with that. What day were you wanting to leave on? Sentence3: May I please have the price for this train? Sentence4: You're very welcome. Enjoy your visit. Sentence5: Yes, I think so. I hear a lot of good things about them. Can you book me a room for 7 people for 2 nights on Friday please? Sentence6: No thanks that's all I need for today. Thanks for the help. Sentence7: Can you help me find a hotel called El Shaddai? Thanks. Sentence8: TR8464 is your best bet. It leaves Cambridge at 11:21 on Sunday and arrives in Stevenage at 12:10. Sentence9: Yes, El Shaddai is a cheap guesthouse in the town centre. Would you like to book this guesthouse? Sentence10: I also need a train going to stevenage and arriving there by 13:00. Sentence11: The cost is 10.24 pounds. Would you like me to book a ticket? Sentence12: Your booking was successful, the reference number is OQ4FTSP6, can i help with anything else? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User