You might learn how to use commas.
A letter accepting an interview does not have to be long. You just need to confirm that date, time, and location of the interview and thank the company for inviting you to interview with them.
How one should reply depends on whether the applicant has decided, based on the information received in the initial interview, to continue their application. If so, then they should reply promptly, with a view to arranging the interview at a convenient time. I not, then a formal note informing the employer that they have decided not to further pursue the position would be appropriate.
One normally does not have to reply to a thank you letter.
I don't understand the question.
On a Letter it usually means 'regards' In an email letter it usually means 'reply'
You can always reply to a compliment by saying thank you.
Reply to email function will send email to all the address in the "cc" of the original email, so if you want to only send email to one person you must only use "reply" not "reply to all"
Rubbish interview questions
The ideal way to reschedule an interview is by phone. Speak to the person (or their immediate assistant) with whom you have the interview to reschedule the appointment. The first person interaction with this person will give you the opportunity to express your eagerness to have the interview and your regret for having to reschedule.
Acceptable attendance means never calling in sick if you are not really sick, never calling in to take an emergency leave if its not really an emergency and staying late or coming in on your day off if the company needs you
If you would like to confirm your attendance by email you should just write an email stating you appreciate the opportunity and the persons time to interview you and you will be there at that time.
To reply to an invitation for an scholarship interview session, you must be cordial yet professional at the same time. Be sure to state your name again and to clearly give your availability for the interview.