The annuncement for the choir

Hi, Mr. [Name]! (^^,)

But we are going to have practice with choir members who will be able to attend this Saturday.

>> But for the choir members who will be able to attend this Saturday, we are going to practice.

And We need 4 dancers for the Easter mass.

>> We also need 4 dancers for the Easter mass.
If someone want to show off their dance skill, feel free to let me know.

>> If someone wants to show off his/her dancing skills, feel free to let me know.

OR >> If someone from the group wants to show off his/her dancing skills, please feel free to let me know.

The dance will be very easy and short.

>> CORRECT!

OR >> The dance steps are simple.
What time would be good for the members Saturday at 4 o’clock or Saturday 7 o’clock?

>> What time would be good for the members to practice on Saturday? Is it at 4 o’clock or 7 o’clock?
Pleas let me know your preferred time

>> Please let me know about your preferred time.

OR >> Please let me know which time you prefer.
Good morning Teather Charry.

>> CORRECT!

OR >> A beautiful morning to you Teather Charry.
I post the eassay for my choir member.

>> I posted the eassay for my choir members.

I have been leading the choir for a long time.

>> CORRECT!
Most of the choir members are foreigner who are studyign and working in Korea and we are serving for the English mass every Sunday.

>> Most of the choir members are foreigners who are studying and working in Korea. We serve for the English mass every Sunday.
Some time, I have to send them messages to let them know the annauncement for them.

>> Sometimes, I have to send them messages to let them know about the announcement/s.

OR >> Sometimes, I have to send them messages to give them an update.
Pleas check my annumcement for them wether I am using right expression or not.

>> Please check my announcement for them and let me know whether I am using the right expressions or not.
Thanks a lot

>> Thanks a lot.