MBR user input

Hello i use this code as MBR
but i try use some C functions to get user input but without issue can someone help me with get user input like this :
Enter your name: Peter
If user string equals Peter then show text Hello PPPeter!

thanks for any advices Smile
Code:
CPU 386
BITS 16
org 0h 


start:                                                                
        
        jmp short load_prog     
        ident   db "ONETOLVE"
                                
        
load_prog:

        cld
        xor ax,ax
        mov ss,ax
        mov sp,7c00h                                    ; setup stack
                
        mov ax,8000h
        mov es,ax                                               ; initialize es w/ 8000h
        mov ds,ax                                               ; initialize ds w/ 8000h
        
        
;
;       Load 6 sectors at es:0000
;

load_1:
        mov ax,0206h                    ;function/# of sec to read
        mov cx,0001h                    ;0-5 sec # (counts from one), 6-7 hi cyl bits
        mov dx,0080h                    ;dh=head dl=drive (bit 7=hdd)
        mov bx,0h                       ;data buffer, points to es:0
        int 13h
        cmp ah,0
        jne load_1                      ;this is allowable because it is
                                                                        ;relative
        
;
;       Jump to code at es:prog_continue
;
        
        push es
        mov ax,prog_continue
        push ax
        retf
        

        
prog_continue:
        
        mov ax,3
        int 10h                                                 ; clear screen
        
;
;       Display the null terminated message located at 0800:0400
;

        
        mov bp,0400h
        mov ah,0eh
        mov si,0ffffh
        
write_char:
        inc si
        cmp byte [ds:bp + si],0                 ; keep writing until there is a null byte 
        jz wait_for_key

        push bp
        
        mov al, [byte ds:bp + si]
        mov bx, 07h
        int 10h                                                 ; teletype the character
        
        pop bp
        
        jmp write_char
        
;
;       Wait for key
;
wait_for_key:
        mov ah,0
        int 16h

;
;       Copy 512 bytes from ds:0200 to 0000:7c00
;       Jump to 0000:7c00h
;

        mov cx,0200h                                    ; 512 bytes
        mov si,0200h                                    ; src location
        xor ax,ax
        mov es,ax                                               ; dest segment
        mov di,7c00h                                    ; dest addr
        rep movsb
                                                ; move 512 bytes

        
;
;       And we're done... jump to the real boot sector
;
;       mov dx,0080h                                    ;BIOS function
;       xor ax,ax
;       push ax
;       mov ax,7c00h
;       push ax
;       retf


times 1beh-($-$$) db 0
        ;ok.. a fake partition table. Who cares.
        db 80h                                   ;active
        db 0,0,0
        db 55h                                   ;fake
        times 59 db 0            
MBR_signature:
        db 55h,0aah