I work in sales. What do you do?
I  create, keep and satisfy the customer's of Hilton for a living, sales manager in other words. 
That sounds like a fun job.
The original meaning which referred literally to going to market with goods for sale. Which is what it feels like what I do. Sales calls all day.
Yes, I am on the phone a lot also.
It's stressful being required for the management process responsible for identifying, anticipating and satisfying customer requirements profitably.
That isn't good. Maybe you should take a vacation.
I'm planning a Summer vacation or holiday from august 1st until the 15th. Going to Vietnam. 
Nice. I have never been to Vietnam.
It's a crazy place. Their is 1 million inhabitants but once you get in the jungle you see no one.