What do you think are the most cliche sentences…?

…used when people try to hide their real feelings or their secret desires?
“No, no you’re perfect. The problem isn’t you, it’s me”
“I’m sorry I’ve got something in my eye” *sniff*
in some cases ” aa dunya ahiret bacimsin”

How can i get cliche sentences for writing?

hi dear
im ali from iran and so desire to learn english but i dont know ,how can find some cliche sentences for writing and speaking
regards