1. A method of creating a grammar used in an interactive voice response system generating prompts based on a menu, comprising: obtaining a first grammar specifying a first set of responses to a first prompt; obtaining a second grammar specifying a second set of responses to a second prompt subsequent to the first prompt; automatically producing a third grammar with a third set of responses to the first prompt that includes the first set of responses and concatenated responses, each combining one response in the first set of responses and one response in the second set of responses to form a sequence of the one response in the first set of responses and one response in the second set of responses.