Develop Booking engine integrated with cloudbeds PMS with upselling capabilities

FULL LIST OF UPSELLS
- Breakfast
- Room upgrades
- Pull inventory, you checked in to Deluxe room but you can upsell a push notification.
- Rewards + Credits
- Activities
- Tickets event
- Nightlife
- Spa
- EVENTS
- In-room Dining. I want ice.
- Live chat feature. Chat butler
Something similar to https://www.upsellguru.com/