Given the task definition, example input & output, solve the new input case.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Example: 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
The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input case for you: Sentence1: I'm afraid I couldn't get you that booking. Would you like me to try another place or a shorter stay? Sentence2: I'm afraid that booking was also unsuccessful. Would you like to try a shorter stay or another hotel or guesthouse? Sentence3: Yes can I get the postcode, and it's a concerthall you said? Sentence4: I was successful in booking 1 night at alexander bed and breakfast on tuesday for 6 people. your reference number is R6FET1MJ . Can I help with anything else? Sentence5: I'm pleased I could assist you. Sentence6: Alexander B & B has both free wifi and parking. It also has 4 stars! Would you like to make a booking there? Sentence7: Hi, i want to find out about the man on the moon attraction please. Sentence8: Yes, please. For 6 people for 3 nights starting on tuesday Sentence9: Excellent, I also need a cheap guesthouse, please. Sentence10: Yes it is a concert hall and the postcode is cb12lf. Sentence11: Alexander bed and breakfast is in the cheap price range in the centre of town. Sentence12: Please try for one night. Sentence13: I need free parking and wifi. Sentence14: How about for 2 nights instead? Sentence15: No that was it. Thank you so much for your help. Sentence16: the man on the moon is a concerthall found in the center of town. Do you need their address and contact details? Question: Who has spoken the sentence 13? (A) User (B) System
Output:
Answer: (B) System