I want to write a letter to my boss requesting him to give me some financial aid to go to Hong Kong to learn proper swimming strokes from a coach. Here is the letter. I think it needs improvement. Could you please help me in making this letter more effective.

My hobby is swimming. I am very keen on learning the proper swimming strokes. As well qualified coaches are not available in India; I intend to go to Hong Kong to get this training on 4th May for 6 days. I have calculated that total estimated cost on this account will come around Rs. 1,50,000/- including the Coaching fee, Return Ticket fare etc.. This much amount is at very high end for me.

It would be very helpful of you, if you could provide me a financial help of Rs. 50,000/- to meet ________?