Which design pattern needs to implement to the below statement?

Application has more than one source to receive the data. The source has to be identified based on the platform/domain (where user belongs to). Provide a solution to resolve platform and invoke the call to respective source service to get the data. Chosen platform is linked to the user but not always fixed. Today It may be source A and it can be changed to source B Ttomorrow. Resolution strategy could be configurable.