What’s your use case?
There are different ways to skin this cat. Holger mentioned one way: using tasks. Another way, for example, is if the service is being kicked off by some user action on a webpage, you could have the service return HTML back to the user, which allows the user to supply more information back to the service (or to a different service.) Of course, the submission would start a new execution so it’s not the same as saying that the service asked for input then continued. However, the end result is perhaps the same depending on what you’re trying to do.
Percio
#webMethods#Integration-Server-and-ESB#webMethods-General