# Parse user input using the Spacy model
doc = nlp(user_input)

# Identify the most similar pre-defined response
best_response = responses[0]
best_similarity = doc.similarity(nlp(responses[0]))
for response in responses:
    similarity = doc.similarity(nlp(response))
    if similarity > best_similarity:
        best_response = response
        best_similarity = similarity

# Respond with the most similar pre-defined response
print("Bot: " + best_response)