make org, purpose, destination optional

components/wizard/reason.tsx

@@ -14,14 +14,12 @@ export default function Contact() {
         name="purpose"
         value={purpose}
         onChange={onChangeEvent}
-        required
       />
       <Input
         label="Ziel der Fahrt"
         name="destination"
         value={destination}
         onChange={onChangeEvent}
-        required
       />
       <Input label="Verein" name="org" value={org} onChange={onChangeEvent} />
     </>

db/booking.ts

@@ -12,9 +12,9 @@ export interface BookingDocument
   startDate: Date
   endDate: Date
   status: BOOKING_STATUS
-  purpose: string
-  org: string
-  destination: string
+  purpose?: string
+  org?: string
+  destination?: string
   days?: string[]
 }