Warning--use proper grammar (Capital first letter, period at end) or else the project will not understand you. Some examples of speech are any sort of greeting, or "Lets have a conversation.", or "I am sad." Basically anything! Another fun option is "Lets chat." You can even respond to it's statements!
Song ("Sing me a song.")--Demon Girls:Mocking Bird. Programming--Me. If it does not comprehend your phrase, comment it below and I will incorporate it into this.