1. Thank you for...

Thank you for your invitation.

Well, thank you for coming.

Thank you for your help.

It was my pleasure. Anytime.

Thank you for your support.

There's no need to thank me. You earned my support.

Thank you for your offer.

You're welcome.

Thank you for saying so. I mean it, really.

Thank you for everything.

Don't mention it. It was nothing, really.