The conversation between human and AI assistant.
[|Human|] Given two text documents, determine which one is the most relevant given a keyword.
[|AI|] Based on the given keyword "customer service," Document 1 would be the most relevant, as it explicitly mentions Acme Corp's challenges with customer service, whereas Document 2 mentions customer satisfaction but not customer service specifically.
[|Human|] 
Given two text documents, determine which one is the most relevant given a keyword.