What does mais bien sur que oui madame in English?

Note: This sentence needs correct punctuation for an accurate translation:

Mais oui! (emphatic "Yes!")

Je serai là. = I'll be there.

À bientôt. = See you. / See you soon.

Mais oui! Je serai là. À bientôt. = Yes! I'll be there. See you soon.

NOTE: If you leave out the ( à ) and just say; "Mais oui! Je serai là bientôt.", the meaning changes to: "Yes! I'll be there soon."