From "Memorable Quotes" on the imdb
Sullivan, ticket seller: Where to, Dolly?
Dolly Levi: Yonkers, New York, to handle a highly personal matter for Mr. Horace Vandergelder, the well-known, unmarried, half-a-millionaire.
Sullivan, ticket seller: Gonna marry him yourself, Dolly?
Dolly Levi: Why, Mr. Sullivan, whatever put such a preposterous idea into my head...er, your head!