# cancellable_booking > Money flow `std.money_flows.cancellable_booking`, source `open/hsx/std/money_flows/cancellable_booking.hsx`. - Exports: 1 - Ports: none ## cancellable_booking No doc comment. - Form: `instrument` - Application form: `instrument cancellable_booking( guest: party, host: party, amount: money, starts_at: date, late_penalty_bps: integer, late_within: text, early_penalty_bps: integer, offer_life: text, )` - Type parameters: C | Parameter | Declared as | | --- | --- | | `guest` | `guest: party` | | `host` | `host: party` | | `amount` | `amount: money` | | `starts_at` | `starts_at: date` | | `late_penalty_bps` | `late_penalty_bps: integer` | | `late_within` | `late_within: text` | | `early_penalty_bps` | `early_penalty_bps: integer` | | `offer_life` | `offer_life: text` |