How do I start a formal conversation on Facebook? Can I use konnichiwa?

I was going to ask my Japanese teacher a bunch of question but didnt know how to start the conversation? or:I was going to ask my Japanese teacher a b

I was going to ask my Japanese teacher a bunch of question but didn't know how to start the conversation?

or:I was going to ask my Japanese teacher a bunch of question but didn't know how to start the conversation?

or:You can start with kon'nichiwa sono y\u014d naOr with Ohay\u014d

Tags:conversation,formal,question,