I'd like you to revise these sentences. I need to include words really used when enquiring for a hotel room. Thank you very much,Writeacher.

1)My husband and I would like to spend the period from 3 August to 20 August at Your hotel. In particular, we are looking for a double room (+ extra bed for our five-year-old child). We would like to have breakfast and dinner at your hotel.
2) I would be grateful if you could let us have details about the price as soon as possible.
3) This is another enquiry.
We are looking for a four-star hotel with sea front which offers a kids club and a play ground for our five-year-old child.

Although I am not Writeacher, here goes:

1 )My husband and I would like to spend the period from August 3 to August 20 at (NO CAPITAL) Your hotel. In particular, we are looking for a double room (BED?) PLUS AN extra bed for our five-year-old child. We would like to have breakfast and dinner at your hotel.
2) I would be grateful if you could let us have details about the price as soon as possible.
3) This is another enquiry (USA USES INQUIRY).
We are looking for a four-star hotel with (ON A) sea front (COMMA) which offers a kids club and a playground for our five-year-old child.

I hope this helps. Capitals are for contrast.

PsyDAG is right.

"a double room" is not a clear term. You need to specify that you want the room for 3 people -- a queen or a king for yourself and your wife, plus an extra bed for your child. OR you could specify that you want a room with two queens or two kings and not have to explain yourself at all!

I've made this correction before: ... a kids' club ...
The possessive (kids') is needed here.

Revised sentences with commonly used phrases for enquiring about a hotel room:

1) My husband and I are planning to stay at your hotel from 3 August to 20 August. We are specifically interested in a double room with an additional bed for our five-year-old child. Could you please confirm if breakfast and dinner are included in our stay?

2) We would greatly appreciate it if you could provide us with pricing details as soon as possible.

3) Here is another inquiry. We are in search of a four-star hotel situated by the sea, which also offers a kids club and a playground for our five-year-old child.