Make this formal

Question

Mother I am here sorry to make you wait

Answer 1

Dear Mother,

I apologize for causing you to wait. Thank you for your patience.

Answer 2

Make this formal I am righting a book ok that is why I am doing this

Mother I am sorry he bows and says how sorry he is

Answer 3

Dear Mother,

Please accept my apologies for causing you to wait. I humbly express my regrets.