How to Stop Macro If User Presses Cancel on Input box or Presses X for Exit

Hello, I have this code that has a couple of input boxes. I just noticed a flaw, if I press cancel or exit out, the code still runs. Is there a way to stop the code if user presses cancel on any of the input boxes and stops the code from creating a sheet?
Here is my code

Sub Add_Physician()
    Dim employeeID As Variant
    Dim LastName As Variant
    
    Sheets("Template - Phys Standard").Copy Before:=Sheets(1)
    employeeID = InputBox("Enter Employee ID")
    LastName = InputBox("Enter Employee Last Name")
    
    Sheets(1).Name = employeeID & "_" & LastName
    
    Range("E7").Value = employeeID
    
End Sub

Thanks.

Sorry I am not an expert. Can you kindly show me how to use it in my example code above?

Sub Add_Physician()
    Dim myDetails(1), x, i As Long
    x = Array("ID", "Last Name")
    For i = 0 To 1
        myDetails(i) = InputBox("Enter Employee " & x(i))
        If myDetails(i) = "" Then Exit Sub
    Next
    myDetails(1) = Join(myDetails, "_")
    '↓ you also need to see if the named sheet is already exists or not.
    If Not Evaluate("isref('" & myDetails(1) & "'!a1)") Then
        Sheets("Template - Phys Standard").Copy Sheets(1)
        Sheets(1).Name = myDetails(1)
    End If
    With Sheets(myDetails(1))
        .Activate
        .Range("E7").Value = myDetails(0)
    End With
End Sub

Oh wow...thank you Jindon and thank you bebo021999...Your solutions are beautiful.