How to write a reply to check whether the child is in hospital?

Reply is a kind of official letter, which is generally used to reply to the negotiation, inquiry or contact of the sender. It mainly consists of three parts, namely, title, text and signature. The title is mainly composed of issuing authority, cause and genre, and cannot be omitted. The text is mainly composed of four parts, namely, receipt, opening, reply and ending. The signature is generally the issuing authority and date, and the official seal is also required.