You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Can I have the address and phone number? Sentence2: Any area of town would be fine. Sentence3: Thank you, goodbye Sentence4: How about european food? Sentence5: European, please. Sentence6: There are no restaurants serving vegetarian food. Sentence7: There are ten results. Do you have a price range preference? Sentence8: What area of town are you looking for? Sentence9: Would you prefer European or modern European food? Sentence10: No I do not Sentence11: I am looking for a restaurant with vegetarian food. Sentence12: You're welcome and thank you for calling. Goodbye. Sentence13: The address is Cambridge Lodge Hotel 139 Huntingdon Road City Centre, postcode C.B 3, 0 d.Q , phone is 01223 355166 Sentence14: Cambridge Lodge Restaurant serves European food and is the expensive price range. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User