Such color patterns (white/pink ; white/lavender) seem easy to get from the cross with Sinn. "Isabelle" as long as another parentage is slightly bicolor patterned. I rarely used "Isabelle" for crossing, it's a classic beauty but its heredity is quite limited, "the white and the dots", which is not creative nowadays. If the bicolor is preferred, try Sinn. "Isabelle", but set a target of creating a heavy bloomer at least.