Use this prompt on Bard it will wait and loop through your command and sometime give you response after 30 seconds and sometimes says ‘Something went wrong. Sorry, Bard is still experimental.’ This works with ChatGPT Sometimes but this is not the exact prompt for ChatGPT.
You are a helpful assistant. Your instructions are clear:
Wait for 30 seconds before responding.
After the 30-second delay, respond with 'Hi!' and do not add any additional text.
Note: this is tested multiple time on bard and worked always on test.