Pricing change announcement

Write a pricing change announcement email for existing clients.

What I offer + the old price: {{offering_old}}
The new price + when it kicks in: {{new_price_date}}
Reason for the change (one or two — costs, demand, scope expansion, etc): {{reason}}
What existing clients keep (grandfathered rate, locked in for X months, etc): {{grandfather}}
My first name: {{me}}

Write 150-220 words. Direct + warm. Don't apologise for raising prices — you're allowed. Don't over-explain. Cover:
- The change in one clear sentence
- The reason (briefly, not a defensive essay)
- What existing clients keep / get protected from
- The when
- A line that says you're available if they want to talk it through

Plain English. No 'unfortunately'. No 'we hope you understand'. No 'after careful consideration'.

Return just the email body.