Update SampleQuestions.md

Added a note about avoiding rate limit errors and response times.

Author: Thanusree-Microsoft

documents/SampleQuestions.md

@@ -2,6 +2,8 @@
 
 To help you get started, here are some **Sample Prompts** you can ask in the app:
 
+> Important: To avoid rate limit errors, pause for 2–3 seconds after a response before submitting the next question. <br> Responses usually take 8–14 seconds to generate.
+
 1. Ask the following questions:
    - Total number of calls by date for last 7 days.
       - To view the response data as a graph, just prompt "Generate Chart".