if(dialogid == 371)
    {
        if(!response)
        {
            SendClientMessage(playerid,COLOR_YELLOW,"You exit from dialog!");
            return 1; I was try with return and without it but it doens't send anything if I press Exit in dialog
        }
        if(response)
        {
//here is code for house buy
        }
    }]

if(dialogid == 371)
    {
        if(response)
        {
//code for response
        }
        else //if player click cancel or something 
        {
            and I click cancel but nothing happens but I put some text if player click cancel
        }
    }

new message1[256];
                format(message1,sizeof(message1),"{33AA33}This vehicle is renting!\n\n{FFFFFF}The price of vehicle: {33AA33}%d$\n\n{FFFFFF}Click on {33AA33}Rent {FFFFFF}or {33AA33}Cancel",RentACar2[x][2]);
                ShowPlayerDialog(playerid,371,DIALOG_STYLE_MSGBOX,"{33AA33}Rent Car",message1,"Rent","Cancel");

// This callback gets called when a player interacts with a dialog
public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    // Select the proper dialog to process
    switch (dialogid)
    {
        case DialogSupportSettings: Dialog_SupportSettings(playerid, response, listitem); // Process the SupportSettings main-menu
        case DialogNewGlobConsumptionMul: Dialog_NewGlobConsumptionMul(playerid, response, inputtext); // Process the value given for a new GlobalConsumptionMul setting
        case DialogNewPricePerLitre: Dialog_NewPricePerLitre(playerid, response, inputtext); // Process the value given for a new PricePerLitre setting
        case DialogNewFinePerUnit: Dialog_NewFinePerUnit(playerid, response, inputtext); // Process the value given for a new FinePerUnit setting

        case DialogRegister: Dialog_Register(playerid, response, inputtext); // The "Register"-dialog
        case DialogLogin: Dialog_Login(playerid, response, inputtext); // The "Login"-dialog

        case DialogSelectVehicleClass: Dialog_SelectVehicleClass(playerid, response, listitem); // Process the chosen vehicle-class when using the /v or /editv commands
        case DialogSelectVehicle: Dialog_SelectVehicle(playerid, response, listitem); // Spawn a vehicle with /v or edit it's model-data using /editv
        case DialogSelectVehicleModelData: Dialog_SelectVehicleModelData(playerid, response, listitem); // Process the chosen vehiclemodel-data to be edited
        case DialogVModelNewPrice: Dialog_VModelNewPrice(playerid, response, inputtext);
        case DialogVModelNewMaxFuel: Dialog_VModelNewMaxFuel(playerid, response, inputtext);
        case DialogVModelNewConsumption: Dialog_VModelNewConsumption(playerid, response, inputtext);
        case DialogVModelNewRefuelTime: Dialog_VModelNewRefuelTime(playerid, response, inputtext);

        case DialogBuyCompany: Dialog_BuyCompany(playerid, response);
        case DialogBuyCompanyAskName: Dialog_BuyCompanyAskName(playerid, response, inputtext);
        case DialogInviteToCompany: Dialog_InviteToCompany(playerid, response);
        case DialogCompanyData: Dialog_CompanyData(playerid, response, listitem);
        case DialogCompanyLeave: Dialog_CompanyLeave(playerid, response);
    }

    // A filterscript should always return 0 here, otherwise the other filterscripts and the gamemode cannot process any dialog
    return 0;
}