Is it correct to write the following?
Since you have asked me about the planning of a farewell party for your English teacher, I’m happy to help you with some suggestions.
Is there any way to improve the sentance?
“Since you have asked me about the planning of a farewell party for your English teacher,I’m happy to help you with some suggestions.”
This is perfectly good if just a little long. There is nothing wrong with it. Some might suggest you leave out the comma but not me. I might go with “You're planning a farewell party for your English teacher. Since you have asked me I’m [I'll be] happy to help you with some suggestions.” Making two sentences out of this one makes it a bit easier to read or hear.