When should I use Slack versus email versus a phone call?
For quick communication and memes, Slack is a good medium.  For longer form communication, or those that include external parties that are not available on Slack, email is an excellent choice.  Phone calls are useful for instantaneous feedback, fluid dialog, and establishing emotional rapport with the participants.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
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Answer the following query.
When should I use Slack versus email versus a phone call?

user
For quick communication and memes, Slack is a good medium.  For longer form communication, or those that include external parties that are not available on Slack, email is an excellent choice.  Phone calls are useful for instantaneous feedback, fluid dialog, and establishing emotional rapport with the participants.
assistant