Create a demo api using functional style, reactive and non blocking api- Urgent

Assume api will be deployed to multiple region data centres.
Solution shall expose http RestfulAPI.
Endpoint “/flight” should respond with flight information.
Request data is “Date/airport of departure/arrival”, Response data should contain
“flight number”. In between request and response you have to implement five
independent downstream connections, each could take 500-800ms. Mock this
responses with artificial random delay. Assume “flight number” might be changed
once per 24 hours.
SLA is 850ms, load might vary: from 1K to 50K request per second.
Endpoint “/price” should take “flight number and date” as a parameter and return a
“price”. Assume “pricing engine rules” (mock this object) taking 3GB RAM - you have to
keep in memory.
SLA is 50ms, load is around 50 request per day.
Use Spring webflux functional programming style, reactive and non blocking API.