We are a company that deal in the supply of flowers and would like to request an introduction letter for our clients

Why would your clients need a letter of introduction?
Do you mean prospective clients?
Letters of introduction are a thing of the past and get tossed in the trash. Print a glossy picture/price brochure.

The introduction letter is for prospective clients overseas. I'm planning on sending them an email introducing the company.

My name is navas ,indian ,opening new business in Saudi me providing business emergency seale and serving we are interesting joing for my business any time contact me 234578913456