Ez így érthető? Szállásfoglalás angolul

Dear xy,

I am yx from Hungary. I am writing, because I read your advertisement. As you can see, we are planning our staying for 6 nights, if it is possible.

We are about 9 people at the age of 18-19.

Could you please let me know that you have free place for that time?

Can we change later our departure date, and the number of the group?

In the description were 4 types of beaches mentioned: sanded, peeble,rocky and a beach covered with concrete. There are all the four types?

Could you please send me a price-offer?

I am looking forward for your answer.

Yours faithfully: yx