[He's rather taken back by Donatello's forwardness, but truly appreciates the help.]

Well in all honesty, I've been using the piano at the Seventh Heaven restaurant. But I found my piano from home just recently at at the furniture store, so you see why I am in need of help moving it.

[His ears hear that second sentence and is smiling warmly at it.] I would be honored to play a piece for you, consider it as payment for your help with moving my piano.