Question

'What are your immediate plans, Bertie?'
'Well, I rather thought of tottering out for a bite of lunch later on, and then possibly staggering round to the club, and after that, if I felt strong enough, I might trickle off to Walton Heath for a round of golf.'
'I am not interested in your totterings and tricklings. I mean, have you any important engagements in the next week or so?'
I scented danger.'Rather,' I said. 'Heaps! Millions! Booked solid!'
How does this passage refine the story's overall theme?
Bertie is a busy person with many important responsibilities to attend to.