This is a classic among most of my friends and family.
During my college days my roommate and I were up talking quite late. As we were about to retire to bed I told her I was going for a run next morning. She said “Sounds, good. Wake me up also.” I nodded.
Next morning I went to her room to wake her up.
Me: “I am going for a run.”
She: “What time is it?”
She: “Hey, don’t confuse me in the morning. Is it 9 or is it 10?”